231231572 has 24 divisors (see below), whose sum is σ = 475400352. Its totient is φ = 97020000.

The previous prime is 231231557. The next prime is 231231613. The reversal of 231231572 is 275132132.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201554 + ... + 202697.

It is an arithmetic number, because the mean of its divisors is an integer number (19808348).

Almost surely, 2^231231572 is an apocalyptic number.

231231572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231231572 is an abundant number, since it is smaller than the sum of its proper divisors (244168780).

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

231231572 is a wasteful number, since it uses less digits than its factorization.

231231572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404279 (or 404277 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 231231572 is about 15206.3004047664. The cubic root of 231231572 is about 613.7842083518.

The spelling of 231231572 in words is "two hundred thirty-one million, two hundred thirty-one thousand, five hundred seventy-two".