223631442 has 24 divisors (see below), whose sum is σ = 502481616. Its totient is φ = 74543652.

The previous prime is 223631423. The next prime is 223631459. The reversal of 223631442 is 244136322.

223631442 is a `hidden beast` number, since 2 + 23 + 631 + 4 + 4 + 2 = 666.

It is a super-2 number, since 2×223631442² = 100022043701998728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229588 + ... + 230559.

It is an arithmetic number, because the mean of its divisors is an integer number (20936734).

Almost surely, 2^223631442 is an apocalyptic number.

223631442 is an abundant number, since it is smaller than the sum of its proper divisors (278850174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223631442 is an equidigital number, since it uses as much as digits as its factorization.

223631442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460164 (or 460152 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 223631442 is about 14954.3118196726. The cubic root of 223631442 is about 606.9845284459.

Adding to 223631442 its reverse (244136322), we get a palindrome (467767764).

The spelling of 223631442 in words is "two hundred twenty-three million, six hundred thirty-one thousand, four hundred forty-two".