16215130931 has 2 divisors, whose sum is σ = 16215130932. Its totient is φ = 16215130930.

The previous prime is 16215130901. The next prime is 16215130991. The reversal of 16215130931 is 13903151261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16215130931 - 2¹⁴ = 16215114547 is a prime.

It is a super-2 number, since 2×16215130931² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (16215130901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107565465 + 8107565466.

It is an arithmetic number, because the mean of its divisors is an integer number (8107565466).

Almost surely, 2^16215130931 is an apocalyptic number.

16215130931 is a deficient number, since it is larger than the sum of its proper divisors (1).

16215130931 is an equidigital number, since it uses as much as digits as its factorization.

16215130931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 16215130931 in words is "sixteen billion, two hundred fifteen million, one hundred thirty thousand, nine hundred thirty-one".