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55640325 = 35213149383
BaseRepresentation
bin1101010001000…
…0000100000101
310212200211011210
43110100010011
5103220442300
65304322033
71243635456
oct324200405
9125624153
1055640325
1129453444
1216773319
13b6b1790
14756512d
154d41050
hex3510105

55640325 has 48 divisors (see below), whose sum is σ = 99993600. Its totient is φ = 27137280.

The previous prime is 55640287. The next prime is 55640399. The reversal of 55640325 is 52304655.

55640325 = T456 + T457 + ... + T753.

It is not a de Polignac number, because 55640325 - 26 = 55640261 is a prime.

It is a super-2 number, since 2×556403252 = 6191691532211250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55640292 and 55640301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145084 + ... + 145466.

It is an arithmetic number, because the mean of its divisors is an integer number (2083200).

Almost surely, 255640325 is an apocalyptic number.

It is an amenable number.

55640325 is a deficient number, since it is larger than the sum of its proper divisors (44353275).

55640325 is a wasteful number, since it uses less digits than its factorization.

55640325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 55640325 is about 7459.2442646692. The cubic root of 55640325 is about 381.7653891398.

The spelling of 55640325 in words is "fifty-five million, six hundred forty thousand, three hundred twenty-five".

Divisors: 1 3 5 13 15 25 39 65 75 149 195 325 383 447 745 975 1149 1915 1937 2235 3725 4979 5745 5811 9575 9685 11175 14937 24895 28725 29055 48425 57067 74685 124475 145275 171201 285335 373425 741871 856005 1426675 2225613 3709355 4280025 11128065 18546775 55640325