231542630 has 16 divisors (see below), whose sum is σ = 454665744. Its totient is φ = 84197280.

The previous prime is 231542629. The next prime is 231542639. The reversal of 231542630 is 36245132.

It is a super-2 number, since 2×231542630² = 107223979014633800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231542630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231542639) 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, 1052357 + ... + 1052576.

It is an arithmetic number, because the mean of its divisors is an integer number (28416609).

Almost surely, 2^231542630 is an apocalyptic number.

231542630 is a deficient number, since it is larger than the sum of its proper divisors (223123114).

231542630 is a wasteful number, since it uses less digits than its factorization.

231542630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104951.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 231542630 is about 15216.5248989380. The cubic root of 231542630 is about 614.0593105498.

Adding to 231542630 its reverse (36245132), we get a palindrome (267787762).

The spelling of 231542630 in words is "two hundred thirty-one million, five hundred forty-two thousand, six hundred thirty".