22401231 has 16 divisors (see below), whose sum is σ = 30336000. Its totient is φ = 14702688.

The previous prime is 22401229. The next prime is 22401259. The reversal of 22401231 is 13210422.

It is not a de Polignac number, because 22401231 - 2¹ = 22401229 is a prime.

It is a super-2 number, since 2×22401231² = 1003630300630722, 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 22401231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93610 + ... + 93848.

It is an arithmetic number, because the mean of its divisors is an integer number (1896000).

Almost surely, 2^22401231 is an apocalyptic number.

22401231 is a deficient number, since it is larger than the sum of its proper divisors (7934769).

22401231 is a wasteful number, since it uses less digits than its factorization.

22401231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22401231 is about 4732.9938728040. The cubic root of 22401231 is about 281.8971130123.

Adding to 22401231 its reverse (13210422), we get a palindrome (35611653).

The spelling of 22401231 in words is "twenty-two million, four hundred one thousand, two hundred thirty-one".