51337320 has 64 divisors (see below), whose sum is σ = 154552320. Its totient is φ = 13641984.

The previous prime is 51337309. The next prime is 51337327. The reversal of 51337320 is 2373315.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51337327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45402 + ... + 46518.

It is an arithmetic number, because the mean of its divisors is an integer number (2414880).

Almost surely, 2^51337320 is an apocalyptic number.

It is an amenable number.

51337320 is an abundant number, since it is smaller than the sum of its proper divisors (103215000).

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

51337320 is a wasteful number, since it uses less digits than its factorization.

51337320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 51337320 is about 7165.0066294456. The cubic root of 51337320 is about 371.6587806469.

The spelling of 51337320 in words is "fifty-one million, three hundred thirty-seven thousand, three hundred twenty".