23215837 has 2 divisors, whose sum is σ = 23215838. Its totient is φ = 23215836.

The previous prime is 23215831. The next prime is 23215849. The reversal of 23215837 is 73851232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22838841 + 376996 = 4779^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 23215837 - 2²³ = 14827229 is a prime.

It is a super-2 number, since 2×23215837² = 1077950175221138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23215799 and 23215808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23215831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11607918 + 11607919.

It is an arithmetic number, because the mean of its divisors is an integer number (11607919).

Almost surely, 2^23215837 is an apocalyptic number.

It is an amenable number.

23215837 is a deficient number, since it is larger than the sum of its proper divisors (1).

23215837 is an equidigital number, since it uses as much as digits as its factorization.

23215837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 23215837 is about 4818.2815401344. The cubic root of 23215837 is about 285.2735119238.

The spelling of 23215837 in words is "twenty-three million, two hundred fifteen thousand, eight hundred thirty-seven".