23513155 has 8 divisors (see below), whose sum is σ = 28308384. Its totient is φ = 18748800.

The previous prime is 23513137. The next prime is 23513201. The reversal of 23513155 is 55131532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23513155 - 2⁵ = 23513123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6006 + ... + 9115.

It is an arithmetic number, because the mean of its divisors is an integer number (3538548).

Almost surely, 2^23513155 is an apocalyptic number.

23513155 is a deficient number, since it is larger than the sum of its proper divisors (4795229).

23513155 is a wasteful number, since it uses less digits than its factorization.

23513155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15437.

The product of its digits is 2250, while the sum is 25.

The square root of 23513155 is about 4849.0365022342. The cubic root of 23513155 is about 286.4861529551.

Adding to 23513155 its reverse (55131532), we get a palindrome (78644687).

The spelling of 23513155 in words is "twenty-three million, five hundred thirteen thousand, one hundred fifty-five".