16256531031 has 16 divisors (see below), whose sum is σ = 24357613056. Its totient is φ = 9569061216.

The previous prime is 16256531029. The next prime is 16256531047. The reversal of 16256531031 is 13013565261.

It is not a de Polignac number, because 16256531031 - 2¹ = 16256531029 is a prime.

It is a super-2 number, since 2×16256531031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16256530983 and 16256531001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16256531021) 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, 9060715 + ... + 9062508.

It is an arithmetic number, because the mean of its divisors is an integer number (1522350816).

Almost surely, 2^16256531031 is an apocalyptic number.

16256531031 is a deficient number, since it is larger than the sum of its proper divisors (8101082025).

16256531031 is a wasteful number, since it uses less digits than its factorization.

16256531031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18123262.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 16256531031 in words is "sixteen billion, two hundred fifty-six million, five hundred thirty-one thousand, thirty-one".