253124441325421 has 2 divisors, whose sum is σ = 253124441325422. Its totient is φ = 253124441325420.

The previous prime is 253124441325391. The next prime is 253124441325463. The reversal of 253124441325421 is 124523144421352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225868586655625 + 27255854669796 = 15028925^2 + 5220714^2 .

It is a cyclic number.

It is not a de Polignac number, because 253124441325421 - 2⁵ = 253124441325389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253124441325221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126562220662710 + 126562220662711.

It is an arithmetic number, because the mean of its divisors is an integer number (126562220662711).

Almost surely, 2^{253124441325421} is an apocalyptic number.

It is an amenable number.

253124441325421 is a deficient number, since it is larger than the sum of its proper divisors (1).

253124441325421 is an equidigital number, since it uses as much as digits as its factorization.

253124441325421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 43.

Adding to 253124441325421 its reverse (124523144421352), we get a palindrome (377647585746773).

The spelling of 253124441325421 in words is "two hundred fifty-three trillion, one hundred twenty-four billion, four hundred forty-one million, three hundred twenty-five thousand, four hundred twenty-one".