252542551 has 4 divisors (see below), whose sum is σ = 256002112. Its totient is φ = 249082992.

The previous prime is 252542533. The next prime is 252542561. The reversal of 252542551 is 155245252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 252542551 - 2¹⁵ = 252509783 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 (252542561) 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, 1729671 + ... + 1729816.

It is an arithmetic number, because the mean of its divisors is an integer number (64000528).

Almost surely, 2^252542551 is an apocalyptic number.

252542551 is a deficient number, since it is larger than the sum of its proper divisors (3459561).

252542551 is an equidigital number, since it uses as much as digits as its factorization.

252542551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459560.

The product of its digits is 20000, while the sum is 31.

The square root of 252542551 is about 15891.5874285736. The cubic root of 252542551 is about 632.0889347353.

The spelling of 252542551 in words is "two hundred fifty-two million, five hundred forty-two thousand, five hundred fifty-one".