29225521 has 4 divisors (see below), whose sum is σ = 31473652. Its totient is φ = 26977392.

The previous prime is 29225513. The next prime is 29225531. The reversal of 29225521 is 12552292.

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 15800625 + 13424896 = 3975^2 + 3664^2 .

It is not a de Polignac number, because 29225521 - 2³ = 29225513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29225521.

It is not an unprimeable number, because it can be changed into a prime (29225531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124046 + ... + 1124071.

It is an arithmetic number, because the mean of its divisors is an integer number (7868413).

Almost surely, 2^29225521 is an apocalyptic number.

It is an amenable number.

29225521 is a deficient number, since it is larger than the sum of its proper divisors (2248131).

29225521 is a wasteful number, since it uses less digits than its factorization.

29225521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248130.

The product of its digits is 3600, while the sum is 28.

The square root of 29225521 is about 5406.0633551596. The cubic root of 29225521 is about 308.0260315604.

The spelling of 29225521 in words is "twenty-nine million, two hundred twenty-five thousand, five hundred twenty-one".