22400331 has 8 divisors (see below), whose sum is σ = 29889024. Its totient is φ = 14922600.

The previous prime is 22400327. The next prime is 22400333. The reversal of 22400331 is 13300422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22400331 - 2² = 22400327 is a prime.

It is a super-2 number, since 2×22400331² = 1003549657819122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22400331.

It is not an unprimeable number, because it can be changed into a prime (22400333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6190 + ... + 9116.

It is an arithmetic number, because the mean of its divisors is an integer number (3736128).

Almost surely, 2^22400331 is an apocalyptic number.

22400331 is a deficient number, since it is larger than the sum of its proper divisors (7488693).

22400331 is a wasteful number, since it uses less digits than its factorization.

22400331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22400331 is about 4732.8987946078. The cubic root of 22400331 is about 281.8933377614.

Adding to 22400331 its reverse (13300422), we get a palindrome (35700753).

Subtracting from 22400331 its reverse (13300422), we obtain a palindrome (9099909).

The spelling of 22400331 in words is "twenty-two million, four hundred thousand, three hundred thirty-one".