2151421232 has 20 divisors (see below), whose sum is σ = 4171439856. Its totient is φ = 1074920640.

The previous prime is 2151421229. The next prime is 2151421291. The reversal of 2151421232 is 2321241512.

It is a super-2 number, since 2×2151421232² = 9257226635000795648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2151421198 and 2151421207.

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, 26588 + ... + 70779.

Almost surely, 2^2151421232 is an apocalyptic number.

It is an amenable number.

2151421232 is a deficient number, since it is larger than the sum of its proper divisors (2020018624).

2151421232 is a wasteful number, since it uses less digits than its factorization.

2151421232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98756 (or 98750 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 2151421232 is about 46383.4154844164. The cubic root of 2151421232 is about 1290.9472104954.

Adding to 2151421232 its reverse (2321241512), we get a palindrome (4472662744).

The spelling of 2151421232 in words is "two billion, one hundred fifty-one million, four hundred twenty-one thousand, two hundred thirty-two".