51380655 has 32 divisors (see below), whose sum is σ = 87225600. Its totient is φ = 25754112.

The previous prime is 51380639. The next prime is 51380677. The reversal of 51380655 is 55608315.

It is not a de Polignac number, because 51380655 - 2⁴ = 51380639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38967 + ... + 40263.

It is an arithmetic number, because the mean of its divisors is an integer number (2725800).

Almost surely, 2^51380655 is an apocalyptic number.

51380655 is a deficient number, since it is larger than the sum of its proper divisors (35844945).

51380655 is a wasteful number, since it uses less digits than its factorization.

51380655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 51380655 is about 7168.0300641111. The cubic root of 51380655 is about 371.7633264472.

The spelling of 51380655 in words is "fifty-one million, three hundred eighty thousand, six hundred fifty-five".