252161251 has 16 divisors (see below), whose sum is σ = 263518848. Its totient is φ = 241113600.

The previous prime is 252161249. The next prime is 252161263. The reversal of 252161251 is 152161252.

It is a cyclic number.

It is not a de Polignac number, because 252161251 - 2¹ = 252161249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252161281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805471 + ... + 805783.

It is an arithmetic number, because the mean of its divisors is an integer number (16469928).

Almost surely, 2^252161251 is an apocalyptic number.

252161251 is a deficient number, since it is larger than the sum of its proper divisors (11357597).

252161251 is a wasteful number, since it uses less digits than its factorization.

252161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its digits is 1200, while the sum is 25.

The square root of 252161251 is about 15879.5859832680. The cubic root of 252161251 is about 631.7706558151.

Subtracting from 252161251 its reverse (152161252), we obtain a palindrome (99999999).

The spelling of 252161251 in words is "two hundred fifty-two million, one hundred sixty-one thousand, two hundred fifty-one".