51424642 has 16 divisors (see below), whose sum is σ = 81466560. Its totient is φ = 24296272.

The previous prime is 51424613. The next prime is 51424651. The reversal of 51424642 is 24642415.

It is a self number, because there is not a number n which added to its sum of digits gives 51424642.

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, 2917 + ... + 10552.

It is an arithmetic number, because the mean of its divisors is an integer number (5091660).

Almost surely, 2^51424642 is an apocalyptic number.

51424642 is a deficient number, since it is larger than the sum of its proper divisors (30041918).

51424642 is a wasteful number, since it uses less digits than its factorization.

51424642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13577.

The product of its digits is 7680, while the sum is 28.

The square root of 51424642 is about 7171.0976844553. The cubic root of 51424642 is about 371.8693850999.

The spelling of 51424642 in words is "fifty-one million, four hundred twenty-four thousand, six hundred forty-two".