21252605600515 has 16 divisors (see below), whose sum is σ = 25555350420000. Its totient is φ = 16967271658752.

The previous prime is 21252605600477. The next prime is 21252605600587. The reversal of 21252605600515 is 51500650625212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21252605600515 is a prime.

It is a super-2 number, since 2×21252605600515² (a number of 27 digits) contains 22 as substring.

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, 61036231 + ... + 61383439.

It is an arithmetic number, because the mean of its divisors is an integer number (1597209401250).

Almost surely, 2^{21252605600515} is an apocalyptic number.

21252605600515 is a deficient number, since it is larger than the sum of its proper divisors (4302744819485).

21252605600515 is a wasteful number, since it uses less digits than its factorization.

21252605600515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372246.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 21252605600515 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred five million, six hundred thousand, five hundred fifteen".