51330555 has 12 divisors (see below), whose sum is σ = 88973040. Its totient is φ = 27376272.

The previous prime is 51330547. The next prime is 51330611. The reversal of 51330555 is 55503315.

It is not a de Polignac number, because 51330555 - 2³ = 51330547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570295 + ... + 570384.

It is an arithmetic number, because the mean of its divisors is an integer number (7414420).

Almost surely, 2^51330555 is an apocalyptic number.

51330555 is a deficient number, since it is larger than the sum of its proper divisors (37642485).

51330555 is a wasteful number, since it uses less digits than its factorization.

51330555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140690 (or 1140687 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 27.

The square root of 51330555 is about 7164.5345277973. The cubic root of 51330555 is about 371.6424547583.

The spelling of 51330555 in words is "fifty-one million, three hundred thirty thousand, five hundred fifty-five".