51456402 has 24 divisors (see below), whose sum is σ = 113155536. Its totient is φ = 16895736.

The previous prime is 51456347. The next prime is 51456403. The reversal of 51456402 is 20465415.

51456402 is a `hidden beast` number, since 5 + 14 + 5 + 640 + 2 = 666.

It is a super-2 number, since 2×51456402² = 5295522613571208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51456403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20128 + ... + 22539.

It is an arithmetic number, because the mean of its divisors is an integer number (4714814).

Almost surely, 2^51456402 is an apocalyptic number.

51456402 is an abundant number, since it is smaller than the sum of its proper divisors (61699134).

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

51456402 is a wasteful number, since it uses less digits than its factorization.

51456402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42742 (or 42739 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51456402 is about 7173.3117874522. The cubic root of 51456402 is about 371.9459251958.

The spelling of 51456402 in words is "fifty-one million, four hundred fifty-six thousand, four hundred two".