21152542222413 has 80 divisors (see below), whose sum is σ = 36476846165760. Its totient is φ = 11965187808000.

The previous prime is 21152542222411. The next prime is 21152542222447. The reversal of 21152542222413 is 31422224525112.

21152542222413 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 2 + 5 + 422 + 224 + 1 + 3 = 666.

It is not a de Polignac number, because 21152542222413 - 2¹ = 21152542222411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152542222411) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 323010408 + ... + 323075886.

It is an arithmetic number, because the mean of its divisors is an integer number (455960577072).

Almost surely, 2^{21152542222413} is an apocalyptic number.

It is an amenable number.

21152542222413 is a deficient number, since it is larger than the sum of its proper divisors (15324303943347).

21152542222413 is a wasteful number, since it uses less digits than its factorization.

21152542222413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71240 (or 71231 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 21152542222413 its reverse (31422224525112), we get a palindrome (52574766747525).

The spelling of 21152542222413 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred forty-two million, two hundred twenty-two thousand, four hundred thirteen".