231401522 has 16 divisors (see below), whose sum is σ = 379209600. Its totient is φ = 105029040.

The previous prime is 231401497. The next prime is 231401537. The reversal of 231401522 is 225104132.

231401522 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 junction number, because it is equal to n+sod(n) for n = 231401494 and 231401503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8504 + ... + 23132.

It is an arithmetic number, because the mean of its divisors is an integer number (23700600).

Almost surely, 2^231401522 is an apocalyptic number.

231401522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231401522 is a deficient number, since it is larger than the sum of its proper divisors (147808078).

231401522 is a wasteful number, since it uses less digits than its factorization.

231401522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15361.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 231401522 is about 15211.8875225923. The cubic root of 231401522 is about 613.9345440520.

Adding to 231401522 its reverse (225104132), we get a palindrome (456505654).

The spelling of 231401522 in words is "two hundred thirty-one million, four hundred one thousand, five hundred twenty-two".