85625531 has 4 divisors (see below), whose sum is σ = 86903592. Its totient is φ = 84347472.

The previous prime is 85625509. The next prime is 85625537. The reversal of 85625531 is 13552658.

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 85625531 - 2¹⁸ = 85363387 is a prime.

It is a super-2 number, since 2×85625531² = 14663463118063922, 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 = 85625491 and 85625500.

It is not an unprimeable number, because it can be changed into a prime (85625537) 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, 638930 + ... + 639063.

It is an arithmetic number, because the mean of its divisors is an integer number (21725898).

Almost surely, 2^85625531 is an apocalyptic number.

85625531 is a deficient number, since it is larger than the sum of its proper divisors (1278061).

85625531 is a wasteful number, since it uses less digits than its factorization.

85625531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278060.

The product of its digits is 36000, while the sum is 35.

The square root of 85625531 is about 9253.4064538417. The cubic root of 85625531 is about 440.7589020871.

The spelling of 85625531 in words is "eighty-five million, six hundred twenty-five thousand, five hundred thirty-one".