2151421235 has 16 divisors (see below), whose sum is σ = 2667360000. Its totient is φ = 1664133120.

The previous prime is 2151421229. The next prime is 2151421291. The reversal of 2151421235 is 5321241512.

It is not a de Polignac number, because 2151421235 - 2⁸ = 2151420979 is a prime.

It is a super-2 number, since 2×2151421235² = 9257226660817850450, which contains 22 as substring.

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, 188039 + ... + 199151.

It is an arithmetic number, because the mean of its divisors is an integer number (166710000).

Almost surely, 2^2151421235 is an apocalyptic number.

2151421235 is a deficient number, since it is larger than the sum of its proper divisors (515938765).

2151421235 is a wasteful number, since it uses less digits than its factorization.

2151421235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398.

The product of its digits is 2400, while the sum is 26.

The square root of 2151421235 is about 46383.4155167556. The cubic root of 2151421235 is about 1290.9472110955.

Adding to 2151421235 its reverse (5321241512), we get a palindrome (7472662747).

The spelling of 2151421235 in words is "two billion, one hundred fifty-one million, four hundred twenty-one thousand, two hundred thirty-five".