252121550 has 24 divisors (see below), whose sum is σ = 471672936. Its totient is φ = 100262240.

The previous prime is 252121537. The next prime is 252121567. The reversal of 252121550 is 55121252.

252121550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5924 + ... + 23223.

It is an arithmetic number, because the mean of its divisors is an integer number (19653039).

Almost surely, 2^252121550 is an apocalyptic number.

252121550 is a deficient number, since it is larger than the sum of its proper divisors (219551386).

252121550 is a wasteful number, since it uses less digits than its factorization.

252121550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29332 (or 29327 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 252121550 is about 15878.3358699834. The cubic root of 252121550 is about 631.7374981390.

It can be divided in two parts, 25212 and 1550, that added together give a palindrome (26762).

The spelling of 252121550 in words is "two hundred fifty-two million, one hundred twenty-one thousand, five hundred fifty".