2151223504 has 20 divisors (see below), whose sum is σ = 4168954276. Its totient is φ = 1075364352.

The previous prime is 2151223493. The next prime is 2151223513. The reversal of 2151223504 is 4053221512.

It can be written as a sum of positive squares in 2 ways, for example, as 2002383504 + 148840000 = 44748^2 + 12200^2 .

It is a congruent 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, 70882 + ... + 96574.

Almost surely, 2^2151223504 is an apocalyptic number.

It is an amenable number.

2151223504 is a deficient number, since it is larger than the sum of its proper divisors (2017730772).

2151223504 is a wasteful number, since it uses less digits than its factorization.

2151223504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934 (or 30928 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2151223504 is about 46381.2839839520. The cubic root of 2151223504 is about 1290.9076607896.

The spelling of 2151223504 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, five hundred four".