29889223225 has 27 divisors (see below), whose sum is σ = 37669347471. Its totient is φ = 23526190800.

The previous prime is 29889223219. The next prime is 29889223253. The reversal of 29889223225 is 52232298892.

The square root of 29889223225 is 172885.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10760120361 + 19129102864 = 103731^2 + 138308^2 .

It is not a de Polignac number, because 29889223225 - 2²³ = 29880834617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 61373932 + ... + 61374418.

Almost surely, 2^29889223225 is an apocalyptic number.

29889223225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29889223225 is the 172885-th square number.

29889223225 is the 86443-rd centered octagonal number.

It is an amenable number.

29889223225 is a deficient number, since it is larger than the sum of its proper divisors (7780124246).

29889223225 is an frugal number, since it uses more digits than its factorization.

29889223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 563 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The spelling of 29889223225 in words is "twenty-nine billion, eight hundred eighty-nine million, two hundred twenty-three thousand, two hundred twenty-five".