2151232505 has 4 divisors (see below), whose sum is σ = 2581479012. Its totient is φ = 1720986000.

The previous prime is 2151232477. The next prime is 2151232511. The reversal of 2151232505 is 5052321512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 782824441 + 1368408064 = 27979^2 + 36992^2 .

It is not a de Polignac number, because 2151232505 - 2²⁰ = 2150183929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215123246 + ... + 215123255.

It is an arithmetic number, because the mean of its divisors is an integer number (645369753).

Almost surely, 2^2151232505 is an apocalyptic number.

It is an amenable number.

2151232505 is a deficient number, since it is larger than the sum of its proper divisors (430246507).

2151232505 is an equidigital number, since it uses as much as digits as its factorization.

2151232505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430246506.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2151232505 is about 46381.3810165243. The cubic root of 2151232505 is about 1290.9094612292.

The spelling of 2151232505 in words is "two billion, one hundred fifty-one million, two hundred thirty-two thousand, five hundred five".