2153421511 has 4 divisors (see below), whose sum is σ = 2158218000. Its totient is φ = 2148625024.

The previous prime is 2153421503. The next prime is 2153421521. The reversal of 2153421511 is 1151243512.

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

It is a cyclic number.

It is not a de Polignac number, because 2153421511 - 2³ = 2153421503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153421521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397571 + ... + 2398468.

It is an arithmetic number, because the mean of its divisors is an integer number (539554500).

Almost surely, 2^2153421511 is an apocalyptic number.

2153421511 is a deficient number, since it is larger than the sum of its proper divisors (4796489).

2153421511 is an equidigital number, since it uses as much as digits as its factorization.

2153421511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796488.

The product of its digits is 1200, while the sum is 25.

The square root of 2153421511 is about 46404.9729123938. The cubic root of 2153421511 is about 1291.3471716448.

The spelling of 2153421511 in words is "two billion, one hundred fifty-three million, four hundred twenty-one thousand, five hundred eleven".