51020556 has 24 divisors (see below), whose sum is σ = 121295664. Its totient is φ = 16685760.

The previous prime is 51020551. The next prime is 51020561. The reversal of 51020556 is 65502015.

It is an interprime number because it is at equal distance from previous prime (51020551) and next prime (51020561).

It is not an unprimeable number, because it can be changed into a prime (51020551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39475 + ... + 40746.

It is an arithmetic number, because the mean of its divisors is an integer number (5053986).

Almost surely, 2^51020556 is an apocalyptic number.

It is an amenable number.

51020556 is an abundant number, since it is smaller than the sum of its proper divisors (70275108).

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

51020556 is a wasteful number, since it uses less digits than its factorization.

51020556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80281 (or 80279 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51020556 is about 7142.8674914211. The cubic root of 51020556 is about 370.8927940788.

The spelling of 51020556 in words is "fifty-one million, twenty thousand, five hundred fifty-six".