51994764 has 24 divisors (see below), whose sum is σ = 134801520. Its totient is φ = 17331552.

The previous prime is 51994717. The next prime is 51994771. The reversal of 51994764 is 46749915.

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, 240609 + ... + 240824.

It is an arithmetic number, because the mean of its divisors is an integer number (5616730).

Almost surely, 2^51994764 is an apocalyptic number.

51994764 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51994764 is an abundant number, since it is smaller than the sum of its proper divisors (82806756).

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

51994764 is a wasteful number, since it uses less digits than its factorization.

51994764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481446 (or 481438 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 51994764 is about 7210.7394905100. The cubic root of 51994764 is about 373.2385874225.

The spelling of 51994764 in words is "fifty-one million, nine hundred ninety-four thousand, seven hundred sixty-four".