53402865 has 48 divisors (see below), whose sum is σ = 92424192. Its totient is φ = 26320896.

The previous prime is 53402837. The next prime is 53402873. The reversal of 53402865 is 56820435.

It is not a de Polignac number, because 53402865 - 2¹⁴ = 53386481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 420432 + ... + 420558.

It is an arithmetic number, because the mean of its divisors is an integer number (1925504).

Almost surely, 2^53402865 is an apocalyptic number.

It is an amenable number.

53402865 is a deficient number, since it is larger than the sum of its proper divisors (39021327).

53402865 is a wasteful number, since it uses less digits than its factorization.

53402865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 53402865 is about 7307.7263906088. The cubic root of 53402865 is about 376.5779200253.

The spelling of 53402865 in words is "fifty-three million, four hundred two thousand, eight hundred sixty-five".