23015545 has 12 divisors (see below), whose sum is σ = 32128164. Its totient is φ = 15781920.

The previous prime is 23015543. The next prime is 23015549. The reversal of 23015545 is 54551032.

It can be written as a sum of positive squares in 2 ways, for example, as 6927424 + 16088121 = 2632^2 + 4011^2 .

It is not a de Polignac number, because 23015545 - 2¹ = 23015543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23015543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46726 + ... + 47215.

It is an arithmetic number, because the mean of its divisors is an integer number (2677347).

Almost surely, 2^23015545 is an apocalyptic number.

It is an amenable number.

23015545 is a deficient number, since it is larger than the sum of its proper divisors (9112619).

23015545 is an equidigital number, since it uses as much as digits as its factorization.

23015545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93960 (or 93953 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 23015545 is about 4797.4519278467. The cubic root of 23015545 is about 284.4507529944.

Adding to 23015545 its reverse (54551032), we get a palindrome (77566577).

The spelling of 23015545 in words is "twenty-three million, fifteen thousand, five hundred forty-five".