22321013 has 12 divisors (see below), whose sum is σ = 26369568. Its totient is φ = 18729360.

The previous prime is 22321009. The next prime is 22321021. The reversal of 22321013 is 31012322.

It is a happy number.

It is not a de Polignac number, because 22321013 - 2² = 22321009 is a prime.

It is a super-3 number, since 3×22321013³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22321043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4145 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (2197464).

Almost surely, 2^22321013 is an apocalyptic number.

It is an amenable number.

22321013 is a deficient number, since it is larger than the sum of its proper divisors (4048555).

22321013 is a wasteful number, since it uses less digits than its factorization.

22321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12044 (or 12031 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22321013 is about 4724.5119324646. The cubic root of 22321013 is about 281.5602227640.

Adding to 22321013 its reverse (31012322), we get a palindrome (53333335).

The spelling of 22321013 in words is "twenty-two million, three hundred twenty-one thousand, thirteen".