231563290 has 32 divisors (see below), whose sum is σ = 504382464. Its totient is φ = 74722560.

The previous prime is 231563251. The next prime is 231563303. The reversal of 231563290 is 92365132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96106 + ... + 98485.

It is an arithmetic number, because the mean of its divisors is an integer number (15761952).

Almost surely, 2^231563290 is an apocalyptic number.

231563290 is an abundant number, since it is smaller than the sum of its proper divisors (272819174).

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

231563290 is a wasteful number, since it uses less digits than its factorization.

231563290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194622.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 231563290 is about 15217.2037510181. The cubic root of 231563290 is about 614.0775736922.

The spelling of 231563290 in words is "two hundred thirty-one million, five hundred sixty-three thousand, two hundred ninety".