51642404 has 24 divisors (see below), whose sum is σ = 101773056. Its totient is φ = 22716000.

The previous prime is 51642401. The next prime is 51642407. The reversal of 51642404 is 40424615.

It is an interprime number because it is at equal distance from previous prime (51642401) and next prime (51642407).

It is not an unprimeable number, because it can be changed into a prime (51642401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17567 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (4240544).

Almost surely, 2^51642404 is an apocalyptic number.

It is an amenable number.

51642404 is a deficient number, since it is larger than the sum of its proper divisors (50130652).

51642404 is a wasteful number, since it uses less digits than its factorization.

51642404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37907 (or 37905 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 51642404 is about 7186.2649547592. The cubic root of 51642404 is about 372.3935500519.

The spelling of 51642404 in words is "fifty-one million, six hundred forty-two thousand, four hundred four".