51367720 has 32 divisors (see below), whose sum is σ = 116471520. Its totient is φ = 20388160.

The previous prime is 51367709. The next prime is 51367733. The reversal of 51367720 is 2776315.

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, 339 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (3639735).

Almost surely, 2^51367720 is an apocalyptic number.

It is an amenable number.

51367720 is an abundant number, since it is smaller than the sum of its proper divisors (65103800).

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

51367720 is a wasteful number, since it uses less digits than its factorization.

51367720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9945 (or 9941 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 51367720 is about 7167.1277371064. The cubic root of 51367720 is about 371.7321268825.

The spelling of 51367720 in words is "fifty-one million, three hundred sixty-seven thousand, seven hundred twenty".