23513145 has 16 divisors (see below), whose sum is σ = 37763520. Its totient is φ = 12492864.

The previous prime is 23513137. The next prime is 23513201. The reversal of 23513145 is 54131532.

It is not a de Polignac number, because 23513145 - 2³ = 23513137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326 + ... + 6984.

It is an arithmetic number, because the mean of its divisors is an integer number (2360220).

Almost surely, 2^23513145 is an apocalyptic number.

It is an amenable number.

23513145 is a deficient number, since it is larger than the sum of its proper divisors (14250375).

23513145 is a wasteful number, since it uses less digits than its factorization.

23513145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944.

The product of its digits is 1800, while the sum is 24.

The square root of 23513145 is about 4849.0354711014. The cubic root of 23513145 is about 286.4861123415.

Adding to 23513145 its reverse (54131532), we get a palindrome (77644677).

The spelling of 23513145 in words is "twenty-three million, five hundred thirteen thousand, one hundred forty-five".