29811225 has 24 divisors (see below), whose sum is σ = 50130720. Its totient is φ = 15627520.

The previous prime is 29811211. The next prime is 29811227. The reversal of 29811225 is 52211892.

It is not a de Polignac number, because 29811225 - 2⁶ = 29811161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29811192 and 29811201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29811227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (2088780).

Almost surely, 2^29811225 is an apocalyptic number.

29811225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29811225 is a deficient number, since it is larger than the sum of its proper divisors (20319495).

29811225 is a wasteful number, since it uses less digits than its factorization.

29811225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809 (or 6804 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 29811225 is about 5459.9656592327. The cubic root of 29811225 is about 310.0701367493.

The spelling of 29811225 in words is "twenty-nine million, eight hundred eleven thousand, two hundred twenty-five".