252836337513521 has 2 divisors, whose sum is σ = 252836337513522. Its totient is φ = 252836337513520.

The previous prime is 252836337513511. The next prime is 252836337513563. The reversal of 252836337513521 is 125315733638252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246167031263521 + 6669306250000 = 15689711^2 + 2582500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252836337513521 is a prime.

It is a super-2 number, since 2×252836337513521² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252836337513511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126418168756760 + 126418168756761.

It is an arithmetic number, because the mean of its divisors is an integer number (126418168756761).

Almost surely, 2^{252836337513521} is an apocalyptic number.

It is an amenable number.

252836337513521 is a deficient number, since it is larger than the sum of its proper divisors (1).

252836337513521 is an equidigital number, since it uses as much as digits as its factorization.

252836337513521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 56.

The spelling of 252836337513521 in words is "two hundred fifty-two trillion, eight hundred thirty-six billion, three hundred thirty-seven million, five hundred thirteen thousand, five hundred twenty-one".