252153202421 has 4 divisors (see below), whose sum is σ = 253759273932. Its totient is φ = 250547130912.

The previous prime is 252153202417. The next prime is 252153202513. The reversal of 252153202421 is 124202351252.

It is a happy number.

252153202421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 186252664900 + 65900537521 = 431570^2 + 256711^2 .

It is a cyclic number.

It is not a de Polignac number, because 252153202421 - 2² = 252153202417 is a prime.

It is a super-2 number, since 2×252153202421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252153502421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803035520 + ... + 803035833.

It is an arithmetic number, because the mean of its divisors is an integer number (63439818483).

Almost surely, 2^252153202421 is an apocalyptic number.

It is an amenable number.

252153202421 is a deficient number, since it is larger than the sum of its proper divisors (1606071511).

252153202421 is a wasteful number, since it uses less digits than its factorization.

252153202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606071510.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 252153202421 its reverse (124202351252), we get a palindrome (376355553673).

The spelling of 252153202421 in words is "two hundred fifty-two billion, one hundred fifty-three million, two hundred two thousand, four hundred twenty-one".