252331740 has 96 divisors (see below), whose sum is σ = 803362560. Its totient is φ = 65717568.

The previous prime is 252331733. The next prime is 252331789. The reversal of 252331740 is 47133252.

252331740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×252331740² = 127342614022855200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17787 + ... + 28653.

It is an arithmetic number, because the mean of its divisors is an integer number (8368360).

Almost surely, 2^252331740 is an apocalyptic number.

252331740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252331740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401681280).

252331740 is an abundant number, since it is smaller than the sum of its proper divisors (551030820).

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

252331740 is a wasteful number, since it uses less digits than its factorization.

252331740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928 (or 10920 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 252331740 is about 15884.9532577216. The cubic root of 252331740 is about 631.9130061053.

Adding to 252331740 its reverse (47133252), we get a palindrome (299464992).

The spelling of 252331740 in words is "two hundred fifty-two million, three hundred thirty-one thousand, seven hundred forty".