2054215021455 has 24 divisors (see below), whose sum is σ = 3715449779808. Its totient is φ = 1047947372736.

The previous prime is 2054215021447. The next prime is 2054215021459. The reversal of 2054215021455 is 5541205124502.

2054215021455 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 2 + 1 + 502 + 145 + 5 = 666.

It is not a de Polignac number, because 2054215021455 - 2³ = 2054215021447 is a prime.

It is a super-2 number, since 2×2054215021455² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2054215021459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 992373372 + ... + 992375441.

It is an arithmetic number, because the mean of its divisors is an integer number (154810407492).

Almost surely, 2^{2054215021455} is an apocalyptic number.

2054215021455 is a deficient number, since it is larger than the sum of its proper divisors (1661234758353).

2054215021455 is a wasteful number, since it uses less digits than its factorization.

2054215021455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984748847 (or 1984748844 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 2054215021455 in words is "two trillion, fifty-four billion, two hundred fifteen million, twenty-one thousand, four hundred fifty-five".