2153052515421 has 6 divisors (see below), whose sum is σ = 3109964744510. Its totient is φ = 1435368343608.

The previous prime is 2153052515309. The next prime is 2153052515431. The reversal of 2153052515421 is 1245152503512.

2153052515421 is a `hidden beast` number, since 2 + 1 + 53 + 0 + 52 + 515 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1742954444100 + 410098071321 = 1320210^2 + 640389^2 .

It is not a de Polignac number, because 2153052515421 - 2⁷ = 2153052515293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153052515431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119614028626 + ... + 119614028643.

Almost surely, 2^{2153052515421} is an apocalyptic number.

It is an amenable number.

2153052515421 is a deficient number, since it is larger than the sum of its proper divisors (956912229089).

2153052515421 is a wasteful number, since it uses less digits than its factorization.

2153052515421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239228057275 (or 239228057272 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 2153052515421 in words is "two trillion, one hundred fifty-three billion, fifty-two million, five hundred fifteen thousand, four hundred twenty-one".