985956531 has 64 divisors (see below), whose sum is σ = 1688325120. Its totient is φ = 498216960.

The previous prime is 985956511. The next prime is 985956539. The reversal of 985956531 is 135659589.

It is not a de Polignac number, because 985956531 - 2⁶ = 985956467 is a prime.

It is a super-2 number, since 2×985956531² = 1944220562043107922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (985956539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 928741 + ... + 929801.

It is an arithmetic number, because the mean of its divisors is an integer number (26380080).

Almost surely, 2^985956531 is an apocalyptic number.

985956531 is a deficient number, since it is larger than the sum of its proper divisors (702368589).

985956531 is a wasteful number, since it uses less digits than its factorization.

985956531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244.

The product of its digits is 1458000, while the sum is 51.

The square root of 985956531 is about 31399.9447610979. The cubic root of 985956531 is about 995.2967578594.

The spelling of 985956531 in words is "nine hundred eighty-five million, nine hundred fifty-six thousand, five hundred thirty-one".