2151531055 has 8 divisors (see below), whose sum is σ = 2585392992. Its totient is φ = 1718854368.

The previous prime is 2151531043. The next prime is 2151531089. The reversal of 2151531055 is 5501351512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151531055 - 2⁵ = 2151531023 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 292312 + ... + 299581.

It is an arithmetic number, because the mean of its divisors is an integer number (323174124).

Almost surely, 2^2151531055 is an apocalyptic number.

2151531055 is a deficient number, since it is larger than the sum of its proper divisors (433861937).

2151531055 is an equidigital number, since it uses as much as digits as its factorization.

2151531055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592625.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 2151531055 is about 46384.5993299500. The cubic root of 2151531055 is about 1290.9691763291.

Adding to 2151531055 its reverse (5501351512), we get a palindrome (7652882567).

The spelling of 2151531055 in words is "two billion, one hundred fifty-one million, five hundred thirty-one thousand, fifty-five".