22312501 has 2 divisors, whose sum is σ = 22312502. Its totient is φ = 22312500.

The previous prime is 22312489. The next prime is 22312547. The reversal of 22312501 is 10521322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 7986276 = 3785^2 + 2826^2 .

It is a cyclic number.

It is not a de Polignac number, because 22312501 - 2⁵ = 22312469 is a prime.

It is a super-3 number, since 3×22312501³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22316501) by changing a digit.

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 as a sum of consecutive naturals, namely, 11156250 + 11156251.

It is an arithmetic number, because the mean of its divisors is an integer number (11156251).

Almost surely, 2^22312501 is an apocalyptic number.

It is an amenable number.

22312501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22312501 is an equidigital number, since it uses as much as digits as its factorization.

22312501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22312501 is about 4723.6110127740. The cubic root of 22312501 is about 281.5244277140.

Adding to 22312501 its reverse (10521322), we get a palindrome (32833823).

The spelling of 22312501 in words is "twenty-two million, three hundred twelve thousand, five hundred one".