23121310 has 32 divisors (see below), whose sum is σ = 42729120. Its totient is φ = 9005568.

The previous prime is 23121283. The next prime is 23121331. The reversal of 23121310 is 1312132.

23121310 = 151² + 152² + ... + 417².

It is a super-2 number, since 2×23121310² = 1069189952232200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73714 + ... + 74026.

It is an arithmetic number, because the mean of its divisors is an integer number (1335285).

Almost surely, 2^23121310 is an apocalyptic number.

23121310 is a deficient number, since it is larger than the sum of its proper divisors (19607810).

23121310 is a wasteful number, since it uses less digits than its factorization.

23121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 23121310 is about 4808.4623321806. The cubic root of 23121310 is about 284.8858063081.

Adding to 23121310 its reverse (1312132), we get a palindrome (24433442).

The spelling of 23121310 in words is "twenty-three million, one hundred twenty-one thousand, three hundred ten".