23515136 has 26 divisors (see below), whose sum is σ = 47032722. Its totient is φ = 11755520.

The previous prime is 23515117. The next prime is 23515147. The reversal of 23515136 is 63151532.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 3444736 = 4480^2 + 1856^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1226 + ... + 6966.

Almost surely, 2^23515136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23515136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23516361).

23515136 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23515136 is an frugal number, since it uses more digits than its factorization.

23515136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765 (or 5743 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 23515136 is about 4849.2407653157. The cubic root of 23515136 is about 286.4941982831.

Adding to 23515136 its reverse (63151532), we get a palindrome (86666668).

The spelling of 23515136 in words is "twenty-three million, five hundred fifteen thousand, one hundred thirty-six".