22431442 has 16 divisors (see below), whose sum is σ = 37972800. Its totient is φ = 9844240.

The previous prime is 22431439. The next prime is 22431473. The reversal of 22431442 is 24413422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16942 + ... + 18217.

It is an arithmetic number, because the mean of its divisors is an integer number (2373300).

Almost surely, 2^22431442 is an apocalyptic number.

22431442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22431442 is a deficient number, since it is larger than the sum of its proper divisors (15541358).

22431442 is a wasteful number, since it uses less digits than its factorization.

22431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35201.

The product of its digits is 1536, while the sum is 22.

The square root of 22431442 is about 4736.1843291831. The cubic root of 22431442 is about 282.0237811710.

Adding to 22431442 its reverse (24413422), we get a palindrome (46844864).

The spelling of 22431442 in words is "twenty-two million, four hundred thirty-one thousand, four hundred forty-two".