252780031 has 4 divisors (see below), whose sum is σ = 288891472. Its totient is φ = 216668592.

The previous prime is 252780019. The next prime is 252780043. The reversal of 252780031 is 130087252.

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

It is an interprime number because it is at equal distance from previous prime (252780019) and next prime (252780043).

It is not a de Polignac number, because 252780031 - 2⁹ = 252779519 is a prime.

It is a super-2 number, since 2×252780031² = 127795488144721922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252780001) 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, 18055710 + ... + 18055723.

It is an arithmetic number, because the mean of its divisors is an integer number (72222868).

Almost surely, 2^252780031 is an apocalyptic number.

252780031 is a deficient number, since it is larger than the sum of its proper divisors (36111441).

252780031 is an equidigital number, since it uses as much as digits as its factorization.

252780031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36111440.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 252780031 is about 15899.0575506852. The cubic root of 252780031 is about 632.2870022852.

The spelling of 252780031 in words is "two hundred fifty-two million, seven hundred eighty thousand, thirty-one".