257455332722431 has 2 divisors, whose sum is σ = 257455332722432. Its totient is φ = 257455332722430.

The previous prime is 257455332722363. The next prime is 257455332722447. The reversal of 257455332722431 is 134227233554752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257455332722431 - 2³⁹ = 256905576908543 is a prime.

It is a super-2 number, since 2×257455332722431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257455332722131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128727666361215 + 128727666361216.

It is an arithmetic number, because the mean of its divisors is an integer number (128727666361216).

Almost surely, 2^{257455332722431} is an apocalyptic number.

257455332722431 is a deficient number, since it is larger than the sum of its proper divisors (1).

257455332722431 is an equidigital number, since it uses as much as digits as its factorization.

257455332722431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336000, while the sum is 55.

The spelling of 257455332722431 in words is "two hundred fifty-seven trillion, four hundred fifty-five billion, three hundred thirty-two million, seven hundred twenty-two thousand, four hundred thirty-one".