51642430 has 32 divisors (see below), whose sum is σ = 112487616. Its totient is φ = 16664064.

The previous prime is 51642421. The next prime is 51642431. The reversal of 51642430 is 3424615.

It is a junction number, because it is equal to n+sod(n) for n = 51642395 and 51642404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642431) 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, 20509 + ... + 22888.

It is an arithmetic number, because the mean of its divisors is an integer number (3515238).

Almost surely, 2^51642430 is an apocalyptic number.

51642430 is an abundant number, since it is smaller than the sum of its proper divisors (60845186).

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

51642430 is a wasteful number, since it uses less digits than its factorization.

51642430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43428.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 51642430 is about 7186.2667637655. The cubic root of 51642430 is about 372.3936125472.

The spelling of 51642430 in words is "fifty-one million, six hundred forty-two thousand, four hundred thirty".