23531140 has 12 divisors (see below), whose sum is σ = 49415436. Its totient is φ = 9412448.

The previous prime is 23531117. The next prime is 23531141. The reversal of 23531140 is 4113532.

It can be written as a sum of positive squares in 2 ways, for example, as 2883204 + 20647936 = 1698^2 + 4544^2 .

It is not an unprimeable number, because it can be changed into a prime (23531141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 588259 + ... + 588298.

It is an arithmetic number, because the mean of its divisors is an integer number (4117953).

Almost surely, 2^23531140 is an apocalyptic number.

23531140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23531140 is an abundant number, since it is smaller than the sum of its proper divisors (25884296).

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

23531140 is a wasteful number, since it uses less digits than its factorization.

23531140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176566 (or 1176564 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 23531140 is about 4850.8906398722. The cubic root of 23531140 is about 286.5591778970.

Adding to 23531140 its reverse (4113532), we get a palindrome (27644672).

It can be divided in two parts, 235 and 31140, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 23531140 in words is "twenty-three million, five hundred thirty-one thousand, one hundred forty".