22215454 has 4 divisors (see below), whose sum is σ = 33323184. Its totient is φ = 11107726.

The previous prime is 22215409. The next prime is 22215491. The reversal of 22215454 is 45451222.

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

It is a super-2 number, since 2×22215454² = 987052792852232, 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, 5553862 + ... + 5553865.

It is an arithmetic number, because the mean of its divisors is an integer number (8330796).

Almost surely, 2^22215454 is an apocalyptic number.

22215454 is a deficient number, since it is larger than the sum of its proper divisors (11107730).

22215454 is a wasteful number, since it uses less digits than its factorization.

22215454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11107729.

The product of its digits is 3200, while the sum is 25.

The square root of 22215454 is about 4713.3272748665. The cubic root of 22215454 is about 281.1156761705.

Adding to 22215454 its reverse (45451222), we get a palindrome (67666676).

The spelling of 22215454 in words is "twenty-two million, two hundred fifteen thousand, four hundred fifty-four".