22051965 has 24 divisors (see below), whose sum is σ = 38210400. Its totient is φ = 10855104.

The previous prime is 22051957. The next prime is 22051979. The reversal of 22051965 is 56915022.

It is a happy number.

It is not a de Polignac number, because 22051965 - 2³ = 22051957 is a prime.

It is a super-2 number, since 2×22051965² = 972578320722450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1815 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (1592100).

Almost surely, 2^22051965 is an apocalyptic number.

It is an amenable number.

22051965 is a deficient number, since it is larger than the sum of its proper divisors (16158435).

22051965 is a wasteful number, since it uses less digits than its factorization.

22051965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8720 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 22051965 is about 4695.9519801633. The cubic root of 22051965 is about 280.4243777319.

Adding to 22051965 its reverse (56915022), we get a palindrome (78966987).

The spelling of 22051965 in words is "twenty-two million, fifty-one thousand, nine hundred sixty-five".