51224928 has 24 divisors (see below), whose sum is σ = 134465688. Its totient is φ = 17074944.

The previous prime is 51224923. The next prime is 51224941. The reversal of 51224928 is 82942215.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266701 + ... + 266892.

It is an arithmetic number, because the mean of its divisors is an integer number (5602737).

Almost surely, 2^51224928 is an apocalyptic number.

It is an amenable number.

51224928 is an abundant number, since it is smaller than the sum of its proper divisors (83240760).

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

51224928 is a wasteful number, since it uses less digits than its factorization.

51224928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533606 (or 533598 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 51224928 is about 7157.1592129839. The cubic root of 51224928 is about 371.3873602065.

The spelling of 51224928 in words is "fifty-one million, two hundred twenty-four thousand, nine hundred twenty-eight".