252169657 has 4 divisors (see below), whose sum is σ = 252206820. Its totient is φ = 252132496.

The previous prime is 252169649. The next prime is 252169661. The reversal of 252169657 is 756961252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27499536 + 224670121 = 5244^2 + 14989^2 .

It is a cyclic number.

It is not a de Polignac number, because 252169657 - 2³ = 252169649 is a prime.

It is a super-2 number, since 2×252169657² = 127179071822995298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252169607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5182 + ... + 23047.

It is an arithmetic number, because the mean of its divisors is an integer number (63051705).

Almost surely, 2^252169657 is an apocalyptic number.

It is an amenable number.

252169657 is a deficient number, since it is larger than the sum of its proper divisors (37163).

252169657 is an equidigital number, since it uses as much as digits as its factorization.

252169657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37162.

The product of its digits is 226800, while the sum is 43.

The square root of 252169657 is about 15879.8506605069. The cubic root of 252169657 is about 631.7776759329. Note that the first 3 decimals are identical.

The spelling of 252169657 in words is "two hundred fifty-two million, one hundred sixty-nine thousand, six hundred fifty-seven".