22400137 has 4 divisors (see below), whose sum is σ = 23374080. Its totient is φ = 21426196.

The previous prime is 22400111. The next prime is 22400149. The reversal of 22400137 is 73100422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73100422 = 2 ⋅36550211.

It is a cyclic number.

It is not a de Polignac number, because 22400137 - 2⁷ = 22400009 is a prime.

It is a super-2 number, since 2×22400137² = 1003532275237538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486937 + ... + 486982.

It is an arithmetic number, because the mean of its divisors is an integer number (5843520).

Almost surely, 2^22400137 is an apocalyptic number.

It is an amenable number.

22400137 is a deficient number, since it is larger than the sum of its proper divisors (973943).

22400137 is an equidigital number, since it uses as much as digits as its factorization.

22400137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973942.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 22400137 is about 4732.8782997242. The cubic root of 22400137 is about 281.8925239719.

Adding to 22400137 its reverse (73100422), we get a palindrome (95500559).

The spelling of 22400137 in words is "twenty-two million, four hundred thousand, one hundred thirty-seven".