51204648 has 32 divisors (see below), whose sum is σ = 139649760. Its totient is φ = 15516480.

The previous prime is 51204631. The next prime is 51204649. The reversal of 51204648 is 84640215.

It is not an unprimeable number, because it can be changed into a prime (51204649) 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, 96715 + ... + 97242.

It is an arithmetic number, because the mean of its divisors is an integer number (4364055).

Almost surely, 2^51204648 is an apocalyptic number.

It is an amenable number.

51204648 is an abundant number, since it is smaller than the sum of its proper divisors (88445112).

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

51204648 is a wasteful number, since it uses less digits than its factorization.

51204648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193977 (or 193973 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 51204648 is about 7155.7423095022. The cubic root of 51204648 is about 371.3383428620.

The spelling of 51204648 in words is "fifty-one million, two hundred four thousand, six hundred forty-eight".