29122213 has 4 divisors (see below), whose sum is σ = 29422540. Its totient is φ = 28821888.

The previous prime is 29122211. The next prime is 29122229. The reversal of 29122213 is 31222192.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17164449 + 11957764 = 4143^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 29122213 - 2¹ = 29122211 is a prime.

It is the 5397-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29122211) by changing a digit.

It is a nontrivial repunit in base 5396.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150018 + ... + 150211.

It is an arithmetic number, because the mean of its divisors is an integer number (7355635).

Almost surely, 2^29122213 is an apocalyptic number.

It is an amenable number.

29122213 is a deficient number, since it is larger than the sum of its proper divisors (300327).

29122213 is an equidigital number, since it uses as much as digits as its factorization.

29122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300326.

The product of its digits is 432, while the sum is 22.

The square root of 29122213 is about 5396.5000694895. The cubic root of 29122213 is about 307.6626605425.

The spelling of 29122213 in words is "twenty-nine million, one hundred twenty-two thousand, two hundred thirteen".