51313608 has 32 divisors (see below), whose sum is σ = 142538400. Its totient is φ = 17104464.

The previous prime is 51313601. The next prime is 51313609. The reversal of 51313608 is 80631315.

51313608 is a `hidden beast` number, since 51 + 3 + 1 + 3 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51313601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118566 + ... + 118997.

It is an arithmetic number, because the mean of its divisors is an integer number (4454325).

Almost surely, 2^51313608 is an apocalyptic number.

It is an amenable number.

51313608 is an abundant number, since it is smaller than the sum of its proper divisors (91224792).

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

51313608 is a wasteful number, since it uses less digits than its factorization.

51313608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237578 (or 237568 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51313608 is about 7163.3517294630. The cubic root of 51313608 is about 371.6015504799.

The spelling of 51313608 in words is "fifty-one million, three hundred thirteen thousand, six hundred eight".