2151032213 has 4 divisors (see below), whose sum is σ = 2346580608. Its totient is φ = 1955483820.

The previous prime is 2151032209. The next prime is 2151032231. The reversal of 2151032213 is 3122301512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2151032213 - 2² = 2151032209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151032263) 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, 97774181 + ... + 97774202.

It is an arithmetic number, because the mean of its divisors is an integer number (586645152).

Almost surely, 2^2151032213 is an apocalyptic number.

It is an amenable number.

2151032213 is a deficient number, since it is larger than the sum of its proper divisors (195548395).

2151032213 is a wasteful number, since it uses less digits than its factorization.

2151032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195548394.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2151032213 is about 46379.2217808794. The cubic root of 2151032213 is about 1290.8693963110.

Adding to 2151032213 its reverse (3122301512), we get a palindrome (5273333725).

The spelling of 2151032213 in words is "two billion, one hundred fifty-one million, thirty-two thousand, two hundred thirteen".