22154012 has 12 divisors (see below), whose sum is σ = 38862096. Its totient is φ = 11050560.

The previous prime is 22154003. The next prime is 22154021. The reversal of 22154012 is 21045122.

It is an interprime number because it is at equal distance from previous prime (22154003) and next prime (22154021).

It is a super-2 number, since 2×22154012² = 981600495392288, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4664 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (3238508).

Almost surely, 2^22154012 is an apocalyptic number.

It is an amenable number.

22154012 is a deficient number, since it is larger than the sum of its proper divisors (16708084).

22154012 is a wasteful number, since it uses less digits than its factorization.

22154012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13228 (or 13226 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 22154012 is about 4706.8048610496. The cubic root of 22154012 is about 280.8562733029.

Adding to 22154012 its reverse (21045122), we get a palindrome (43199134).

The spelling of 22154012 in words is "twenty-two million, one hundred fifty-four thousand, twelve".