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85611431 = 791083689
BaseRepresentation
bin1010001101001…
…01001110100111
312222002111210202
411012211032213
5133404031211
612254541115
72056454003
oct506451647
9188074722
1085611431
1144364154
122480779b
1314976569
14b527703
1577b153b
hex51a53a7

85611431 has 4 divisors (see below), whose sum is σ = 86695200. Its totient is φ = 84527664.

The previous prime is 85611373. The next prime is 85611433. The reversal of 85611431 is 13411658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85611431 - 214 = 85595047 is a prime.

It is a super-2 number, since 2×856114312 = 14658634235735522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85611394 and 85611403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85611433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541766 + ... + 541923.

It is an arithmetic number, because the mean of its divisors is an integer number (21673800).

Almost surely, 285611431 is an apocalyptic number.

85611431 is a deficient number, since it is larger than the sum of its proper divisors (1083769).

85611431 is a wasteful number, since it uses less digits than its factorization.

85611431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083768.

The product of its digits is 2880, while the sum is 29.

The square root of 85611431 is about 9252.6445408867. The cubic root of 85611431 is about 440.7347074277.

The spelling of 85611431 in words is "eighty-five million, six hundred eleven thousand, four hundred thirty-one".

Divisors: 1 79 1083689 85611431