252102254021 has 8 divisors (see below), whose sum is σ = 261479355384. Its totient is φ = 242860075200.

The previous prime is 252102254009. The next prime is 252102254023. The reversal of 252102254021 is 120452201252.

It can be written as a sum of positive squares in 4 ways, for example, as 136780885921 + 115321368100 = 369839^2 + 339590^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252102254021 - 2¹⁸ = 252101991877 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 (252102254023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33726830 + ... + 33734303.

It is an arithmetic number, because the mean of its divisors is an integer number (32684919423).

Almost surely, 2^252102254021 is an apocalyptic number.

It is an amenable number.

252102254021 is a deficient number, since it is larger than the sum of its proper divisors (9377101363).

252102254021 is a wasteful number, since it uses less digits than its factorization.

252102254021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67461271.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 252102254021 its reverse (120452201252), we get a palindrome (372554455273).

The spelling of 252102254021 in words is "two hundred fifty-two billion, one hundred two million, two hundred fifty-four thousand, twenty-one".