51220608 has 32 divisors (see below), whose sum is σ = 136055760. Its totient is φ = 17073408.

The previous prime is 51220577. The next prime is 51220621. The reversal of 51220608 is 80602215.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 66310 + ... + 67077.

Almost surely, 2^51220608 is an apocalyptic number.

It is an amenable number.

51220608 is an abundant number, since it is smaller than the sum of its proper divisors (84835152).

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

51220608 is a wasteful number, since it uses less digits than its factorization.

51220608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133404 (or 133392 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51220608 is about 7156.8574109032. The cubic root of 51220608 is about 371.3769197265.

The spelling of 51220608 in words is "fifty-one million, two hundred twenty thousand, six hundred eight".