252940391 has 4 divisors (see below), whose sum is σ = 275934984. Its totient is φ = 229945800.

The previous prime is 252940381. The next prime is 252940393. The reversal of 252940391 is 193049252.

252940391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252940391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252940393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11497280 + ... + 11497301.

It is an arithmetic number, because the mean of its divisors is an integer number (68983746).

Almost surely, 2^252940391 is an apocalyptic number.

252940391 is a deficient number, since it is larger than the sum of its proper divisors (22994593).

252940391 is a wasteful number, since it uses less digits than its factorization.

252940391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22994592.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 252940391 is about 15904.0998173427. The cubic root of 252940391 is about 632.4206786018.

The spelling of 252940391 in words is "two hundred fifty-two million, nine hundred forty thousand, three hundred ninety-one".