85152431 has 16 divisors (see below), whose sum is σ = 105021504. Its totient is φ = 67233024.

The previous prime is 85152409. The next prime is 85152451. The reversal of 85152431 is 13425158.

It is a cyclic number.

It is not a de Polignac number, because 85152431 - 2¹⁸ = 84890287 is a prime.

It is a super-2 number, since 2×85152431² = 14501873010419522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85152394 and 85152403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85152451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77075 + ... + 78171.

It is an arithmetic number, because the mean of its divisors is an integer number (6563844).

Almost surely, 2^85152431 is an apocalyptic number.

85152431 is a deficient number, since it is larger than the sum of its proper divisors (19869073).

85152431 is a wasteful number, since it uses less digits than its factorization.

85152431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its digits is 4800, while the sum is 29.

The square root of 85152431 is about 9227.8074860717. The cubic root of 85152431 is about 439.9456389452.

Adding to 85152431 its reverse (13425158), we get a palindrome (98577589).

The spelling of 85152431 in words is "eighty-five million, one hundred fifty-two thousand, four hundred thirty-one".