28323157251 has 4 divisors (see below), whose sum is σ = 37764209672. Its totient is φ = 18882104832.

The previous prime is 28323157231. The next prime is 28323157273. The reversal of 28323157251 is 15275132382.

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

It is not a de Polignac number, because 28323157251 - 2²¹ = 28321060099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28323157231) 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, 4720526206 + ... + 4720526211.

It is an arithmetic number, because the mean of its divisors is an integer number (9441052418).

Almost surely, 2^28323157251 is an apocalyptic number.

28323157251 is a deficient number, since it is larger than the sum of its proper divisors (9441052421).

28323157251 is an equidigital number, since it uses as much as digits as its factorization.

28323157251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441052420.

The product of its digits is 100800, while the sum is 39.

The spelling of 28323157251 in words is "twenty-eight billion, three hundred twenty-three million, one hundred fifty-seven thousand, two hundred fifty-one".