252210401 has 4 divisors (see below), whose sum is σ = 255665412. Its totient is φ = 248755392.

The previous prime is 252210391. The next prime is 252210421. The reversal of 252210401 is 104012252.

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 211557025 + 40653376 = 14545^2 + 6376^2 .

It is a cyclic number.

It is not a de Polignac number, because 252210401 - 2⁶ = 252210337 is a prime.

It is a super-3 number, since 3×252210401³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252210401.

It is not an unprimeable number, because it can be changed into a prime (252210421) 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, 1727396 + ... + 1727541.

It is an arithmetic number, because the mean of its divisors is an integer number (63916353).

Almost surely, 2^252210401 is an apocalyptic number.

It is an amenable number.

252210401 is a deficient number, since it is larger than the sum of its proper divisors (3455011).

252210401 is an equidigital number, since it uses as much as digits as its factorization.

252210401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455010.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 252210401 is about 15881.1334922920. The cubic root of 252210401 is about 631.8117003324.

Adding to 252210401 its reverse (104012252), we get a palindrome (356222653).

The spelling of 252210401 in words is "two hundred fifty-two million, two hundred ten thousand, four hundred one".