85622431 has 4 divisors (see below), whose sum is σ = 85941000. Its totient is φ = 85303864.

The previous prime is 85622429. The next prime is 85622437. The reversal of 85622431 is 13422658.

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 85622431 - 2¹ = 85622429 is a prime.

It is a super-2 number, since 2×85622431² = 14662401380699522, 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 = 85622393 and 85622402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85622437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158881 + ... + 159418.

It is an arithmetic number, because the mean of its divisors is an integer number (21485250).

Almost surely, 2^85622431 is an apocalyptic number.

85622431 is a deficient number, since it is larger than the sum of its proper divisors (318569).

85622431 is a wasteful number, since it uses less digits than its factorization.

85622431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318568.

The product of its digits is 11520, while the sum is 31.

The square root of 85622431 is about 9253.2389464446. The cubic root of 85622431 is about 440.7535829217.

The spelling of 85622431 in words is "eighty-five million, six hundred twenty-two thousand, four hundred thirty-one".