23215707 has 8 divisors (see below), whose sum is σ = 34393680. Its totient is φ = 15477120.

The previous prime is 23215691. The next prime is 23215711. The reversal of 23215707 is 70751232.

It is not a de Polignac number, because 23215707 - 2⁴ = 23215691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 859841 = 23215707 / (2 + 3 + 2 + 1 + 5 + 7 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (23295707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429894 + ... + 429947.

It is an arithmetic number, because the mean of its divisors is an integer number (4299210).

Almost surely, 2^23215707 is an apocalyptic number.

23215707 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23215707 is a deficient number, since it is larger than the sum of its proper divisors (11177973).

23215707 is an equidigital number, since it uses as much as digits as its factorization.

23215707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859850 (or 859844 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 23215707 is about 4818.2680498287. The cubic root of 23215707 is about 285.2729794479.

Adding to 23215707 its reverse (70751232), we get a palindrome (93966939).

The spelling of 23215707 in words is "twenty-three million, two hundred fifteen thousand, seven hundred seven".