231541532 has 6 divisors (see below), whose sum is σ = 405197688. Its totient is φ = 115770764.

The previous prime is 231541517. The next prime is 231541567. The reversal of 231541532 is 235145132.

It is a happy number.

231541532 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231541532² = 107222962081814048, which contains 22 as substring.

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, 28942688 + ... + 28942695.

It is an arithmetic number, because the mean of its divisors is an integer number (67532948).

Almost surely, 2^231541532 is an apocalyptic number.

It is an amenable number.

231541532 is a deficient number, since it is larger than the sum of its proper divisors (173656156).

231541532 is a wasteful number, since it uses less digits than its factorization.

231541532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57885387 (or 57885385 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 231541532 is about 15216.4888196982. The cubic root of 231541532 is about 614.0583399032.

Adding to 231541532 its product of digits (3600), we get a palindrome (231545132).

Adding to 231541532 its reverse (235145132), we get a palindrome (466686664).

The spelling of 231541532 in words is "two hundred thirty-one million, five hundred forty-one thousand, five hundred thirty-two".