51642345 has 16 divisors (see below), whose sum is σ = 87488640. Its totient is φ = 25922304.

The previous prime is 51642341. The next prime is 51642401. The reversal of 51642345 is 54324615.

It is not a de Polignac number, because 51642345 - 2² = 51642341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51642341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101005 + ... + 101514.

It is an arithmetic number, because the mean of its divisors is an integer number (5468040).

Almost surely, 2^51642345 is an apocalyptic number.

It is an amenable number.

51642345 is a deficient number, since it is larger than the sum of its proper divisors (35846295).

51642345 is a wasteful number, since it uses less digits than its factorization.

51642345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202544.

The product of its digits is 14400, while the sum is 30.

The square root of 51642345 is about 7186.2608497048. The cubic root of 51642345 is about 372.3934082354.

The spelling of 51642345 in words is "fifty-one million, six hundred forty-two thousand, three hundred forty-five".