15213038212057 has 6 divisors (see below), whose sum is σ = 17696799552858. Its totient is φ = 13039747038864.

The previous prime is 15213038211991. The next prime is 15213038212067. The reversal of 15213038212057 is 75021283031251.

It can be written as a sum of positive squares in only one way, i.e., 10455496382016 + 4757541830041 = 3233496^2 + 2181179^2 .

It is not a de Polignac number, because 15213038212057 - 2¹⁹ = 15213037687769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15213038212067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155235083748 + ... + 155235083845.

It is an arithmetic number, because the mean of its divisors is an integer number (2949466592143).

Almost surely, 2^{15213038212057} is an apocalyptic number.

It is an amenable number.

15213038212057 is a deficient number, since it is larger than the sum of its proper divisors (2483761340801).

15213038212057 is an equidigital number, since it uses as much as digits as its factorization.

15213038212057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310470167607 (or 310470167600 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 15213038212057 in words is "fifteen trillion, two hundred thirteen billion, thirty-eight million, two hundred twelve thousand, fifty-seven".