2151582023 has 4 divisors (see below), whose sum is σ = 2152245480. Its totient is φ = 2150918568.

The previous prime is 2151581987. The next prime is 2151582029. The reversal of 2151582023 is 3202851512.

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 2151582023 - 2¹⁰ = 2151580999 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 (2151582029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326840 + ... + 333357.

It is an arithmetic number, because the mean of its divisors is an integer number (538061370).

Almost surely, 2^2151582023 is an apocalyptic number.

2151582023 is a deficient number, since it is larger than the sum of its proper divisors (663457).

2151582023 is an equidigital number, since it uses as much as digits as its factorization.

2151582023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663456.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 2151582023 is about 46385.1487331883. The cubic root of 2151582023 is about 1290.9793702478.

The spelling of 2151582023 in words is "two billion, one hundred fifty-one million, five hundred eighty-two thousand, twenty-three".