21514555555125 has 64 divisors (see below), whose sum is σ = 36350322328320. Its totient is φ = 11299406688000.

The previous prime is 21514555555043. The next prime is 21514555555133. The reversal of 21514555555125 is 52155555541512.

It is not a de Polignac number, because 21514555555125 - 2¹⁴ = 21514555538741 is a prime.

It is a super-2 number, since 2×21514555555125² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5048055 + ... + 8277195.

It is an arithmetic number, because the mean of its divisors is an integer number (567973786380).

Almost surely, 2^{21514555555125} is an apocalyptic number.

21514555555125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21514555555125 is a deficient number, since it is larger than the sum of its proper divisors (14835766773195).

21514555555125 is a wasteful number, since it uses less digits than its factorization.

21514555555125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229431 (or 3229421 counting only the distinct ones).

The product of its digits is 6250000, while the sum is 51.

The spelling of 21514555555125 in words is "twenty-one trillion, five hundred fourteen billion, five hundred fifty-five million, five hundred fifty-five thousand, one hundred twenty-five".