29211937225 has 9 divisors (see below), whose sum is σ = 36223861863. Its totient is φ = 23368866120.

The previous prime is 29211937187. The next prime is 29211937241. The reversal of 29211937225 is 52273911292.

It is a happy number.

The square root of 29211937225 is 170915.

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., 10516297401 + 18695639824 = 102549^2 + 136732^2 .

It is not a de Polignac number, because 29211937225 - 2⁹ = 29211936713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 837484 + ... + 871666.

Almost surely, 2^29211937225 is an apocalyptic number.

29211937225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29211937225 is the 170915-th square number.

29211937225 is the 85458-th centered octagonal number.

It is an amenable number.

29211937225 is a deficient number, since it is larger than the sum of its proper divisors (7011924638).

29211937225 is an frugal number, since it uses more digits than its factorization.

29211937225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68376 (or 34188 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The spelling of 29211937225 in words is "twenty-nine billion, two hundred eleven million, nine hundred thirty-seven thousand, two hundred twenty-five".