252213697 has 4 divisors (see below), whose sum is σ = 256972500. Its totient is φ = 247454896.

The previous prime is 252213691. The next prime is 252213713. The reversal of 252213697 is 796312252.

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 95863681 + 156350016 = 9791^2 + 12504^2 .

It is a cyclic number.

It is not a de Polignac number, because 252213697 - 2¹¹ = 252211649 is a prime.

It is a super-2 number, since 2×252213697² = 127223497908815618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252213691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2379322 + ... + 2379427.

It is an arithmetic number, because the mean of its divisors is an integer number (64243125).

Almost surely, 2^252213697 is an apocalyptic number.

It is an amenable number.

252213697 is a deficient number, since it is larger than the sum of its proper divisors (4758803).

252213697 is an equidigital number, since it uses as much as digits as its factorization.

252213697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758802.

The product of its digits is 45360, while the sum is 37.

The square root of 252213697 is about 15881.2372628835. The cubic root of 252213697 is about 631.8144525877.

The spelling of 252213697 in words is "two hundred fifty-two million, two hundred thirteen thousand, six hundred ninety-seven".