21623562152315 has 16 divisors (see below), whose sum is σ = 26119319490048. Its totient is φ = 17184916151136.

The previous prime is 21623562152261. The next prime is 21623562152321. The reversal of 21623562152315 is 51325126532612.

It is a cyclic number.

It is not a de Polignac number, because 21623562152315 - 2³⁰ = 21622488410491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4226339 + ... + 7817228.

It is an arithmetic number, because the mean of its divisors is an integer number (1632457468128).

Almost surely, 2^{21623562152315} is an apocalyptic number.

21623562152315 is a deficient number, since it is larger than the sum of its proper divisors (4495757337733).

21623562152315 is a wasteful number, since it uses less digits than its factorization.

21623562152315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12045938.

The product of its digits is 648000, while the sum is 44.

Adding to 21623562152315 its reverse (51325126532612), we get a palindrome (72948688684927).

The spelling of 21623562152315 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred sixty-two million, one hundred fifty-two thousand, three hundred fifteen".