20152125215 has 4 divisors (see below), whose sum is σ = 24182550264. Its totient is φ = 16121700168.

The previous prime is 20152125163. The next prime is 20152125271. The reversal of 20152125215 is 51252125102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51252125102 = 2 ⋅25626062551.

It is a cyclic number.

It is not a de Polignac number, because 20152125215 - 2⁸ = 20152124959 is a prime.

It is a super-2 number, since 2×20152125215² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015212517 + ... + 2015212526.

It is an arithmetic number, because the mean of its divisors is an integer number (6045637566).

Almost surely, 2^20152125215 is an apocalyptic number.

20152125215 is a deficient number, since it is larger than the sum of its proper divisors (4030425049).

20152125215 is an equidigital number, since it uses as much as digits as its factorization.

20152125215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030425048.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 20152125215 in words is "twenty billion, one hundred fifty-two million, one hundred twenty-five thousand, two hundred fifteen".