53477865 has 72 divisors (see below), whose sum is σ = 109549440. Its totient is φ = 24058944.

The previous prime is 53477857. The next prime is 53477873. The reversal of 53477865 is 56877435.

It is an interprime number because it is at equal distance from previous prime (53477857) and next prime (53477873).

It is not a de Polignac number, because 53477865 - 2³ = 53477857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 53477865.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 174042 + ... + 174348.

It is an arithmetic number, because the mean of its divisors is an integer number (1521520).

Almost surely, 2^53477865 is an apocalyptic number.

It is an amenable number.

53477865 is an abundant number, since it is smaller than the sum of its proper divisors (56071575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53477865 is a wasteful number, since it uses less digits than its factorization.

53477865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 53477865 is about 7312.8561451734. The cubic root of 53477865 is about 376.7541286269.

The spelling of 53477865 in words is "fifty-three million, four hundred seventy-seven thousand, eight hundred sixty-five".