29172225 has 12 divisors (see below), whose sum is σ = 48231536. Its totient is φ = 15558480.

The previous prime is 29172217. The next prime is 29172229. The reversal of 29172225 is 52227192.

It is not a de Polignac number, because 29172225 - 2³ = 29172217 is a prime.

It is a super-2 number, since 2×29172225² = 1702037422901250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29172192 and 29172201.

It is not an unprimeable number, because it can be changed into a prime (29172229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194407 + ... + 194556.

Almost surely, 2^29172225 is an apocalyptic number.

29172225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29172225 is a deficient number, since it is larger than the sum of its proper divisors (19059311).

29172225 is a wasteful number, since it uses less digits than its factorization.

29172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388976 (or 388971 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 29172225 is about 5401.1318258306. The cubic root of 29172225 is about 307.8386776761.

The spelling of 29172225 in words is "twenty-nine million, one hundred seventy-two thousand, two hundred twenty-five".