257220937 has 8 divisors (see below), whose sum is σ = 269366400. Its totient is φ = 245155680.

The previous prime is 257220913. The next prime is 257220941. The reversal of 257220937 is 739022752.

257220937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257220937 - 2¹¹ = 257218889 is a prime.

It is a super-2 number, since 2×257220937² = 132325220862315938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257220896 and 257220905.

It is not an unprimeable number, because it can be changed into a prime (257220907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13437 + ... + 26362.

It is an arithmetic number, because the mean of its divisors is an integer number (33670800).

Almost surely, 2^257220937 is an apocalyptic number.

It is an amenable number.

257220937 is a deficient number, since it is larger than the sum of its proper divisors (12145463).

257220937 is a wasteful number, since it uses less digits than its factorization.

257220937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40103.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 257220937 is about 16038.1088972485. The cubic root of 257220937 is about 635.9682560333.

The spelling of 257220937 in words is "two hundred fifty-seven million, two hundred twenty thousand, nine hundred thirty-seven".