51811960 has 16 divisors (see below), whose sum is σ = 116577000. Its totient is φ = 20724768.

The previous prime is 51811927. The next prime is 51811961. The reversal of 51811960 is 6911815.

51811960 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 (51811961) 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 3 ways as a sum of consecutive naturals, for example, 647610 + ... + 647689.

Almost surely, 2^51811960 is an apocalyptic number.

It is an amenable number.

51811960 is an abundant number, since it is smaller than the sum of its proper divisors (64765040).

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

51811960 is a wasteful number, since it uses less digits than its factorization.

51811960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295310 (or 1295306 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 51811960 is about 7198.0525143958. The cubic root of 51811960 is about 372.8006611211.

The spelling of 51811960 in words is "fifty-one million, eight hundred eleven thousand, nine hundred sixty".