231871610819 has 2 divisors, whose sum is σ = 231871610820. Its totient is φ = 231871610818.

The previous prime is 231871610813. The next prime is 231871610827. The reversal of 231871610819 is 918016178132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231871610819 - 2³² = 227576643523 is a prime.

It is a super-2 number, since 2×231871610819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231871610813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115935805409 + 115935805410.

It is an arithmetic number, because the mean of its divisors is an integer number (115935805410).

Almost surely, 2^231871610819 is an apocalyptic number.

231871610819 is a deficient number, since it is larger than the sum of its proper divisors (1).

231871610819 is an equidigital number, since it uses as much as digits as its factorization.

231871610819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 47.

The spelling of 231871610819 in words is "two hundred thirty-one billion, eight hundred seventy-one million, six hundred ten thousand, eight hundred nineteen".