2154920531715 has 192 divisors, whose sum is σ = 4554367488000. Its totient is φ = 963688078080.

The previous prime is 2154920531669. The next prime is 2154920531773. The reversal of 2154920531715 is 5171350294512.

2154920531715 is a `hidden beast` number, since 2 + 1 + 5 + 49 + 2 + 0 + 531 + 71 + 5 = 666.

It is not a de Polignac number, because 2154920531715 - 2¹⁰ = 2154920530691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 56942850 + ... + 56980680.

It is an arithmetic number, because the mean of its divisors is an integer number (23720664000).

Almost surely, 2^{2154920531715} is an apocalyptic number.

2154920531715 is an abundant number, since it is smaller than the sum of its proper divisors (2399446956285).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154920531715 is a wasteful number, since it uses less digits than its factorization.

2154920531715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38047 (or 38034 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 2154920531715 in words is "two trillion, one hundred fifty-four billion, nine hundred twenty million, five hundred thirty-one thousand, seven hundred fifteen".