252557987 has 4 divisors (see below), whose sum is σ = 275517816. Its totient is φ = 229598160.

The previous prime is 252557983. The next prime is 252557989. The reversal of 252557987 is 789755252.

It is a happy number.

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

It is not a de Polignac number, because 252557987 - 2² = 252557983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252557983) 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, 11479898 + ... + 11479919.

It is an arithmetic number, because the mean of its divisors is an integer number (68879454).

Almost surely, 2^252557987 is an apocalyptic number.

252557987 is a deficient number, since it is larger than the sum of its proper divisors (22959829).

252557987 is a wasteful number, since it uses less digits than its factorization.

252557987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959828.

The product of its digits is 1764000, while the sum is 50.

The square root of 252557987 is about 15892.0730869198. The cubic root of 252557987 is about 632.1018127314.

The spelling of 252557987 in words is "two hundred fifty-two million, five hundred fifty-seven thousand, nine hundred eighty-seven".