1915325231 has 2 divisors, whose sum is σ = 1915325232. Its totient is φ = 1915325230.

The previous prime is 1915325189. The next prime is 1915325233. The reversal of 1915325231 is 1325235191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1915325231 is a prime.

It is a super-2 number, since 2×1915325231² = 7336941481010406722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1915325233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1915325233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 957662615 + 957662616.

It is an arithmetic number, because the mean of its divisors is an integer number (957662616).

Almost surely, 2^1915325231 is an apocalyptic number.

1915325231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1915325231 is an equidigital number, since it uses as much as digits as its factorization.

1915325231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 1915325231 is about 43764.4288321006. The cubic root of 1915325231 is about 1241.8834607829.

The spelling of 1915325231 in words is "one billion, nine hundred fifteen million, three hundred twenty-five thousand, two hundred thirty-one".