22151280 has 40 divisors (see below), whose sum is σ = 68669712. Its totient is φ = 5906944.

The previous prime is 22151279. The next prime is 22151281. The reversal of 22151280 is 8215122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22151279) and next prime (22151281).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45909 + ... + 46388.

Almost surely, 2^22151280 is an apocalyptic number.

22151280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22151280 is an abundant number, since it is smaller than the sum of its proper divisors (46518432).

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

22151280 is a wasteful number, since it uses less digits than its factorization.

22151280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92313 (or 92307 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 22151280 is about 4706.5146339940. The cubic root of 22151280 is about 280.8447279015.

The spelling of 22151280 in words is "twenty-two million, one hundred fifty-one thousand, two hundred eighty".