257229031 has 2 divisors, whose sum is σ = 257229032. Its totient is φ = 257229030.

The previous prime is 257228999. The next prime is 257229047. The reversal of 257229031 is 130922752.

257229031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257229031 - 2⁵ = 257228999 is a prime.

It is a super-2 number, since 2×257229031² = 132333548778397922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257228984 and 257229002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257229061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128614515 + 128614516.

It is an arithmetic number, because the mean of its divisors is an integer number (128614516).

Almost surely, 2^257229031 is an apocalyptic number.

257229031 is a deficient number, since it is larger than the sum of its proper divisors (1).

257229031 is an equidigital number, since it uses as much as digits as its factorization.

257229031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 257229031 is about 16038.3612317468. The cubic root of 257229031 is about 635.9749266581.

The spelling of 257229031 in words is "two hundred fifty-seven million, two hundred twenty-nine thousand, thirty-one".