51939288 has 24 divisors (see below), whose sum is σ = 140669100. Its totient is φ = 17313072.

The previous prime is 51939287. The next prime is 51939299. The reversal of 51939288 is 88293915.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51939287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360618 + ... + 360761.

Almost surely, 2^51939288 is an apocalyptic number.

It is an amenable number.

51939288 is an abundant number, since it is smaller than the sum of its proper divisors (88729812).

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

51939288 is a wasteful number, since it uses less digits than its factorization.

51939288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721391 (or 721384 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 51939288 is about 7206.8917016978. The cubic root of 51939288 is about 373.1057974344.

The spelling of 51939288 in words is "fifty-one million, nine hundred thirty-nine thousand, two hundred eighty-eight".