15000023 has 4 divisors (see below), whose sum is σ = 15075600. Its totient is φ = 14924448.

The previous prime is 15000017. The next prime is 15000031. The reversal of 15000023 is 32000051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32000051 = 61 ⋅524591.

It is a cyclic number.

It is not a de Polignac number, because 15000023 - 2¹² = 14995927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14999968 and 15000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15000053) 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, 37490 + ... + 37887.

It is an arithmetic number, because the mean of its divisors is an integer number (3768900).

Almost surely, 2^15000023 is an apocalyptic number.

15000023 is a deficient number, since it is larger than the sum of its proper divisors (75577).

15000023 is an equidigital number, since it uses as much as digits as its factorization.

15000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75576.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 15000023 is about 3872.9863154935. The cubic root of 15000023 is about 246.6213334838.

Adding to 15000023 its reverse (32000051), we get a palindrome (47000074).

The spelling of 15000023 in words is "fifteen million, twenty-three", and thus it is an aban number and an uban number.