53908257 has 16 divisors (see below), whose sum is σ = 78391040. Its totient is φ = 32752512.

The previous prime is 53908249. The next prime is 53908259. The reversal of 53908257 is 75280935.

It is not a de Polignac number, because 53908257 - 2³ = 53908249 is a prime.

It is a super-2 number, since 2×53908257² = 5812200345556098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (53908259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5668 + ... + 11829.

It is an arithmetic number, because the mean of its divisors is an integer number (4899440).

Almost surely, 2^53908257 is an apocalyptic number.

It is an amenable number.

53908257 is a deficient number, since it is larger than the sum of its proper divisors (24482783).

53908257 is a wasteful number, since it uses less digits than its factorization.

53908257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17592.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 53908257 is about 7342.2242542706. The cubic root of 53908257 is about 377.7621400454.

The spelling of 53908257 in words is "fifty-three million, nine hundred eight thousand, two hundred fifty-seven".