51243408 has 40 divisors (see below), whose sum is σ = 147088800. Its totient is φ = 17080992.

The previous prime is 51243391. The next prime is 51243419. The reversal of 51243408 is 80434215.

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

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, 58878 + ... + 59741.

It is an arithmetic number, because the mean of its divisors is an integer number (3677220).

Almost surely, 2^51243408 is an apocalyptic number.

It is an amenable number.

51243408 is an abundant number, since it is smaller than the sum of its proper divisors (95845392).

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

51243408 is a wasteful number, since it uses less digits than its factorization.

51243408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118636 (or 118624 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 51243408 is about 7158.4501115814. The cubic root of 51243408 is about 371.4320156344.

The spelling of 51243408 in words is "fifty-one million, two hundred forty-three thousand, four hundred eight".