231420552 has 32 divisors (see below), whose sum is σ = 631147680. Its totient is φ = 70127360.

The previous prime is 231420547. The next prime is 231420569. The reversal of 231420552 is 255024132.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 438033 + ... + 438560.

It is an arithmetic number, because the mean of its divisors is an integer number (19723365).

Almost surely, 2^231420552 is an apocalyptic number.

231420552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231420552 is an abundant number, since it is smaller than the sum of its proper divisors (399727128).

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

231420552 is a wasteful number, since it uses less digits than its factorization.

231420552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876613 (or 876609 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 231420552 is about 15212.5130073897. The cubic root of 231420552 is about 613.9513731751.

Adding to 231420552 its reverse (255024132), we get a palindrome (486444684).

The spelling of 231420552 in words is "two hundred thirty-one million, four hundred twenty thousand, five hundred fifty-two".