51401360 has 20 divisors (see below), whose sum is σ = 119508348. Its totient is φ = 20560512.

The previous prime is 51401359. The next prime is 51401377. The reversal of 51401360 is 6310415.

It can be written as a sum of positive squares in 2 ways, for example, as 13897984 + 37503376 = 3728^2 + 6124^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321179 + ... + 321338.

Almost surely, 2^51401360 is an apocalyptic number.

It is an amenable number.

51401360 is an abundant number, since it is smaller than the sum of its proper divisors (68106988).

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

51401360 is a wasteful number, since it uses less digits than its factorization.

51401360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642530 (or 642524 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51401360 is about 7169.4741787665. The cubic root of 51401360 is about 371.8132565617.

Adding to 51401360 its reverse (6310415), we get a palindrome (57711775).

The spelling of 51401360 in words is "fifty-one million, four hundred one thousand, three hundred sixty".