22729551 has 8 divisors (see below), whose sum is σ = 32637360. Its totient is φ = 13987392.

The previous prime is 22729547. The next prime is 22729601. The reversal of 22729551 is 15592722.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22729551 - 2² = 22729547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291366 + ... + 291443.

It is an arithmetic number, because the mean of its divisors is an integer number (4079670).

Almost surely, 2^22729551 is an apocalyptic number.

22729551 is a deficient number, since it is larger than the sum of its proper divisors (9907809).

22729551 is a wasteful number, since it uses less digits than its factorization.

22729551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582825.

The product of its digits is 12600, while the sum is 33.

The square root of 22729551 is about 4767.5518874995. The cubic root of 22729551 is about 283.2676321323.

The spelling of 22729551 in words is "twenty-two million, seven hundred twenty-nine thousand, five hundred fifty-one".