22145442 has 32 divisors (see below), whose sum is σ = 48492864. Its totient is φ = 6686400.

The previous prime is 22145437. The next prime is 22145447. The reversal of 22145442 is 24454122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22145437) and next prime (22145447).

It is not an unprimeable number, because it can be changed into a prime (22145447) 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, 27388 + ... + 28184.

It is an arithmetic number, because the mean of its divisors is an integer number (1515402).

Almost surely, 2^22145442 is an apocalyptic number.

22145442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22145442 is an abundant number, since it is smaller than the sum of its proper divisors (26347422).

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

22145442 is a wasteful number, since it uses less digits than its factorization.

22145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234.

The product of its digits is 2560, while the sum is 24.

The square root of 22145442 is about 4705.8943889552. The cubic root of 22145442 is about 280.8200533969.

Adding to 22145442 its reverse (24454122), we get a palindrome (46599564).

The spelling of 22145442 in words is "twenty-two million, one hundred forty-five thousand, four hundred forty-two".