1521162212453 has 12 divisors (see below), whose sum is σ = 1648801872900. Its totient is φ = 1402763446656.

The previous prime is 1521162212447. The next prime is 1521162212497. The reversal of 1521162212453 is 3542122611251.

It can be written as a sum of positive squares in 6 ways, for example, as 922979075524 + 598183136929 = 960718^2 + 773423^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1521162212453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521162212153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4271528 + ... + 4613921.

It is an arithmetic number, because the mean of its divisors is an integer number (137400156075).

Almost surely, 2^{1521162212453} is an apocalyptic number.

1521162212453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1521162212453 is a deficient number, since it is larger than the sum of its proper divisors (127639660447).

1521162212453 is a wasteful number, since it uses less digits than its factorization.

1521162212453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886488 (or 8886475 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The spelling of 1521162212453 in words is "one trillion, five hundred twenty-one billion, one hundred sixty-two million, two hundred twelve thousand, four hundred fifty-three".