51915580 has 24 divisors (see below), whose sum is σ = 109488960. Its totient is φ = 20677440.

The previous prime is 51915571. The next prime is 51915641. The reversal of 51915580 is 8551915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651 + ... + 10210.

It is an arithmetic number, because the mean of its divisors is an integer number (4562040).

Almost surely, 2^51915580 is an apocalyptic number.

It is an amenable number.

51915580 is an abundant number, since it is smaller than the sum of its proper divisors (57573380).

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

51915580 is a wasteful number, since it uses less digits than its factorization.

51915580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109 (or 11107 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 51915580 is about 7205.2466994545. The cubic root of 51915580 is about 373.0490200005.

The spelling of 51915580 in words is "fifty-one million, nine hundred fifteen thousand, five hundred eighty".