22281542 has 4 divisors (see below), whose sum is σ = 33422316. Its totient is φ = 11140770.

The previous prime is 22281533. The next prime is 22281551. The reversal of 22281542 is 24518222.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22281533) and next prime (22281551).

It is a super-2 number, since 2×22281542² = 992934227795528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5570384 + ... + 5570387.

It is an arithmetic number, because the mean of its divisors is an integer number (8355579).

Almost surely, 2^22281542 is an apocalyptic number.

22281542 is a deficient number, since it is larger than the sum of its proper divisors (11140774).

22281542 is a wasteful number, since it uses less digits than its factorization.

22281542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140773.

The product of its digits is 2560, while the sum is 26.

The square root of 22281542 is about 4720.3328272485. The cubic root of 22281542 is about 281.3941606956.

Adding to 22281542 its reverse (24518222), we get a palindrome (46799764).

The spelling of 22281542 in words is "twenty-two million, two hundred eighty-one thousand, five hundred forty-two".