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2155013430 = 23571833781
BaseRepresentation
bin1000000001110010…
…1110010100110110
312120012001000200020
42000130232110312
513403140412210
6553501230010
7104255211663
oct20034562466
95505030606
102155013430
11a064a3539
12501862306
1328461019b
141662caa6a
15c92d2770
hex8072e536

2155013430 has 16 divisors (see below), whose sum is σ = 5172032304. Its totient is φ = 574670240.

The previous prime is 2155013407. The next prime is 2155013437. The reversal of 2155013430 is 343105512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155013430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155013437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35916861 + ... + 35916920.

It is an arithmetic number, because the mean of its divisors is an integer number (323252019).

Almost surely, 22155013430 is an apocalyptic number.

2155013430 is an abundant number, since it is smaller than the sum of its proper divisors (3017018874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155013430 is a wasteful number, since it uses less digits than its factorization.

2155013430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71833791.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2155013430 is about 46422.1222048282. The cubic root of 2155013430 is about 1291.6653031596.

Adding to 2155013430 its reverse (343105512), we get a palindrome (2498118942).

It can be divided in two parts, 21550 and 13430, that added together give a triangular number (34980 = T264).

The spelling of 2155013430 in words is "two billion, one hundred fifty-five million, thirteen thousand, four hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 71833781 143667562 215501343 359168905 431002686 718337810 1077506715 2155013430