23370521 has 2 divisors, whose sum is σ = 23370522. Its totient is φ = 23370520.

The previous prime is 23370517. The next prime is 23370577. The reversal of 23370521 is 12507332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 2758921 = 4540^2 + 1661^2 .

It is a cyclic number.

It is not a de Polignac number, because 23370521 - 2² = 23370517 is a prime.

It is a super-2 number, since 2×23370521² = 1092362503622882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23370821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11685260 + 11685261.

It is an arithmetic number, because the mean of its divisors is an integer number (11685261).

Almost surely, 2^23370521 is an apocalyptic number.

It is an amenable number.

23370521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23370521 is an equidigital number, since it uses as much as digits as its factorization.

23370521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 23370521 is about 4834.3066721092. The cubic root of 23370521 is about 285.9056896401.

Adding to 23370521 its reverse (12507332), we get a palindrome (35877853).

The spelling of 23370521 in words is "twenty-three million, three hundred seventy thousand, five hundred twenty-one".