642230332 has 6 divisors (see below), whose sum is σ = 1123903088. Its totient is φ = 321115164.

The previous prime is 642230291. The next prime is 642230353. The reversal of 642230332 is 233032246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642230297 and 642230306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80278788 + ... + 80278795.

Almost surely, 2^642230332 is an apocalyptic number.

It is an amenable number.

642230332 is a deficient number, since it is larger than the sum of its proper divisors (481672756).

642230332 is a wasteful number, since it uses less digits than its factorization.

642230332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160557587 (or 160557585 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 642230332 is about 25342.2637505018. The cubic root of 642230332 is about 862.7737788571.

Adding to 642230332 its reverse (233032246), we get a palindrome (875262578).

The spelling of 642230332 in words is "six hundred forty-two million, two hundred thirty thousand, three hundred thirty-two".