2131515455 has 16 divisors (see below), whose sum is σ = 2680516800. Its totient is φ = 1624051968.

The previous prime is 2131515443. The next prime is 2131515553. The reversal of 2131515455 is 5545151312.

It is a cyclic number.

It is not a de Polignac number, because 2131515455 - 2⁴ = 2131515439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12980 + ... + 66569.

It is an arithmetic number, because the mean of its divisors is an integer number (167532300).

Almost surely, 2^2131515455 is an apocalyptic number.

2131515455 is a deficient number, since it is larger than the sum of its proper divisors (549001345).

2131515455 is a wasteful number, since it uses less digits than its factorization.

2131515455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79810.

The product of its digits is 15000, while the sum is 32.

The square root of 2131515455 is about 46168.3382308699. The cubic root of 2131515455 is about 1286.9534209312.

Adding to 2131515455 its reverse (5545151312), we get a palindrome (7676666767).

The spelling of 2131515455 in words is "two billion, one hundred thirty-one million, five hundred fifteen thousand, four hundred fifty-five".