51553970 has 32 divisors (see below), whose sum is σ = 100433088. Its totient is φ = 18940608.

The previous prime is 51553963. The next prime is 51553981. The reversal of 51553970 is 7935515.

It is a self number, because there is not a number n which added to its sum of digits gives 51553970.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28637 + ... + 30383.

It is an arithmetic number, because the mean of its divisors is an integer number (3138534).

Almost surely, 2^51553970 is an apocalyptic number.

51553970 is a deficient number, since it is larger than the sum of its proper divisors (48879118).

51553970 is a wasteful number, since it uses less digits than its factorization.

51553970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 23625, while the sum is 35.

The square root of 51553970 is about 7180.1093306439. The cubic root of 51553970 is about 372.1808626437.

The spelling of 51553970 in words is "fifty-one million, five hundred fifty-three thousand, nine hundred seventy".