51249996 has 120 divisors (see below), whose sum is σ = 156119040. Its totient is φ = 14357088.

The previous prime is 51249967. The next prime is 51249997. The reversal of 51249996 is 69994215.

51249996 is a `hidden beast` number, since 512 + 49 + 9 + 96 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51249997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 133621 + ... + 134003.

It is an arithmetic number, because the mean of its divisors is an integer number (1300992).

Almost surely, 2^51249996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51249996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78059520).

51249996 is an abundant number, since it is smaller than the sum of its proper divisors (104869044).

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

51249996 is a wasteful number, since it uses less digits than its factorization.

51249996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 454 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 51249996 is about 7158.9102522661. The cubic root of 51249996 is about 371.4479324086.

It can be divided in two parts, 51 and 249996, that added together give a cube (250047 = 63³).

The spelling of 51249996 in words is "fifty-one million, two hundred forty-nine thousand, nine hundred ninety-six".