51642230 has 16 divisors (see below), whose sum is σ = 93496464. Its totient is φ = 20536800.

The previous prime is 51642229. The next prime is 51642233. The reversal of 51642230 is 3224615.

It is a junction number, because it is equal to n+sod(n) for n = 51642196 and 51642205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642233) 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, 13196 + ... + 16655.

It is an arithmetic number, because the mean of its divisors is an integer number (5843529).

Almost surely, 2^51642230 is an apocalyptic number.

51642230 is a deficient number, since it is larger than the sum of its proper divisors (41854234).

51642230 is a wasteful number, since it uses less digits than its factorization.

51642230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30031.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 51642230 is about 7186.2528483209. The cubic root of 51642230 is about 372.3931318132.

Adding to 51642230 its reverse (3224615), we get a palindrome (54866845).

The spelling of 51642230 in words is "fifty-one million, six hundred forty-two thousand, two hundred thirty".