51498772 has 12 divisors (see below), whose sum is σ = 97055476. Its totient is φ = 23768640.

The previous prime is 51498749. The next prime is 51498773. The reversal of 51498772 is 27789415.

It can be written as a sum of positive squares in 2 ways, for example, as 19395216 + 32103556 = 4404^2 + 5666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51498773) 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, 495129 + ... + 495232.

Almost surely, 2^51498772 is an apocalyptic number.

51498772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51498772 is a deficient number, since it is larger than the sum of its proper divisors (45556704).

51498772 is a wasteful number, since it uses less digits than its factorization.

51498772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990378 (or 990376 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 51498772 is about 7176.2644878795. The cubic root of 51498772 is about 372.0479858706.

The spelling of 51498772 in words is "fifty-one million, four hundred ninety-eight thousand, seven hundred seventy-two".