2151223023 has 8 divisors (see below), whose sum is σ = 2880823600. Its totient is φ = 1427885568.

The previous prime is 2151223007. The next prime is 2151223033. The reversal of 2151223023 is 3203221512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2151223023 - 2⁴ = 2151223007 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 (2151223033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564978 + ... + 1566351.

It is an arithmetic number, because the mean of its divisors is an integer number (360102950).

Almost surely, 2^2151223023 is an apocalyptic number.

2151223023 is a deficient number, since it is larger than the sum of its proper divisors (729600577).

2151223023 is a wasteful number, since it uses less digits than its factorization.

2151223023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131561.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2151223023 is about 46381.2787986705. The cubic root of 2151223023 is about 1290.9075645767.

Adding to 2151223023 its reverse (3203221512), we get a palindrome (5354444535).

The spelling of 2151223023 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, twenty-three".