525413317621 has 2 divisors, whose sum is σ = 525413317622. Its totient is φ = 525413317620.

The previous prime is 525413317591. The next prime is 525413317643. The reversal of 525413317621 is 126713314525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444470222596 + 80943095025 = 666686^2 + 284505^2 .

It is a cyclic number.

It is not a de Polignac number, because 525413317621 - 2⁵ = 525413317589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525413317021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262706658810 + 262706658811.

It is an arithmetic number, because the mean of its divisors is an integer number (262706658811).

Almost surely, 2^525413317621 is an apocalyptic number.

It is an amenable number.

525413317621 is a deficient number, since it is larger than the sum of its proper divisors (1).

525413317621 is an equidigital number, since it uses as much as digits as its factorization.

525413317621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The spelling of 525413317621 in words is "five hundred twenty-five billion, four hundred thirteen million, three hundred seventeen thousand, six hundred twenty-one".