23145015 has 32 divisors (see below), whose sum is σ = 39214080. Its totient is φ = 11632896.

The previous prime is 23145011. The next prime is 23145019. The reversal of 23145015 is 51054132.

23145015 = 226² + 227² + ... + 432².

It is an interprime number because it is at equal distance from previous prime (23145011) and next prime (23145019).

It is not a de Polignac number, because 23145015 - 2² = 23145011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23144982 and 23145000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24726 + ... + 25644.

It is an arithmetic number, because the mean of its divisors is an integer number (1225440).

Almost surely, 2^23145015 is an apocalyptic number.

23145015 is a deficient number, since it is larger than the sum of its proper divisors (16069065).

23145015 is a wasteful number, since it uses less digits than its factorization.

23145015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 23145015 is about 4810.9266259215. The cubic root of 23145015 is about 284.9831322735.

Adding to 23145015 its reverse (51054132), we get a palindrome (74199147).

The spelling of 23145015 in words is "twenty-three million, one hundred forty-five thousand, fifteen".