51918580 has 48 divisors (see below), whose sum is σ = 125072640. Its totient is φ = 17733888.

The previous prime is 51918551. The next prime is 51918589. The reversal of 51918580 is 8581915.

51918580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49744 + ... + 50776.

It is an arithmetic number, because the mean of its divisors is an integer number (2605680).

Almost surely, 2^51918580 is an apocalyptic number.

It is an amenable number.

51918580 is an abundant number, since it is smaller than the sum of its proper divisors (73154060).

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

51918580 is a wasteful number, since it uses less digits than its factorization.

51918580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51918580 is about 7205.4548780767. The cubic root of 51918580 is about 373.0562055474.

The spelling of 51918580 in words is "fifty-one million, nine hundred eighteen thousand, five hundred eighty".