2152211231 has 4 divisors (see below), whose sum is σ = 2156880264. Its totient is φ = 2147542200.

The previous prime is 2152211219. The next prime is 2152211251. The reversal of 2152211231 is 1321122512.

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 2152211231 - 2⁶ = 2152211167 is a prime.

It is a super-2 number, since 2×2152211231² = 9264026365685070722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152211251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2333825 + ... + 2334746.

It is an arithmetic number, because the mean of its divisors is an integer number (539220066).

Almost surely, 2^2152211231 is an apocalyptic number.

2152211231 is a deficient number, since it is larger than the sum of its proper divisors (4669033).

2152211231 is an equidigital number, since it uses as much as digits as its factorization.

2152211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669032.

The product of its digits is 240, while the sum is 20.

The square root of 2152211231 is about 46391.9306668735. The cubic root of 2152211231 is about 1291.1052025221.

Adding to 2152211231 its reverse (1321122512), we get a palindrome (3473333743).

The spelling of 2152211231 in words is "two billion, one hundred fifty-two million, two hundred eleven thousand, two hundred thirty-one".