256192031 has 2 divisors, whose sum is σ = 256192032. Its totient is φ = 256192030.

The previous prime is 256192021. The next prime is 256192043. The reversal of 256192031 is 130291652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256192031 - 2¹⁰ = 256191007 is a prime.

It is a super-2 number, since 2×256192031² = 131268713495809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256191985 and 256192003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256192021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128096015 + 128096016.

It is an arithmetic number, because the mean of its divisors is an integer number (128096016).

Almost surely, 2^256192031 is an apocalyptic number.

256192031 is a deficient number, since it is larger than the sum of its proper divisors (1).

256192031 is an equidigital number, since it uses as much as digits as its factorization.

256192031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 256192031 is about 16005.9998438086. Note that the first 3 decimals coincide. The cubic root of 256192031 is about 635.1191468411.

The spelling of 256192031 in words is "two hundred fifty-six million, one hundred ninety-two thousand, thirty-one".