29220281 has 16 divisors (see below), whose sum is σ = 31605120. Its totient is φ = 26949120.

The previous prime is 29220277. The next prime is 29220293. The reversal of 29220281 is 18202292.

It is a cyclic number.

It is not a de Polignac number, because 29220281 - 2² = 29220277 is a prime.

It is a super-2 number, since 2×29220281² = 1707649643437922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 29220281.

It is not an unprimeable number, because it can be changed into a prime (29220251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82601 + ... + 82953.

It is an arithmetic number, because the mean of its divisors is an integer number (1975320).

Almost surely, 2^29220281 is an apocalyptic number.

It is an amenable number.

29220281 is a deficient number, since it is larger than the sum of its proper divisors (2384839).

29220281 is a wasteful number, since it uses less digits than its factorization.

29220281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 29220281 is about 5405.5786924251. The cubic root of 29220281 is about 308.0076212484.

The spelling of 29220281 in words is "twenty-nine million, two hundred twenty thousand, two hundred eighty-one".