29520394225 has 27 divisors (see below), whose sum is σ = 42590338497. Its totient is φ = 20238432480.

The previous prime is 29520394213. The next prime is 29520394261. The reversal of 29520394225 is 52249302592.

The square root of 29520394225 is 171815.

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

It can be written as a sum of positive squares in 4 ways, for example, as 8272084401 + 21248309824 = 90951^2 + 145768^2 .

It is not a de Polignac number, because 29520394225 - 2⁵ = 29520394193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6011071 + ... + 6015979.

Almost surely, 2^29520394225 is an apocalyptic number.

29520394225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29520394225 is the 171815-th square number.

29520394225 is the 85908-th centered octagonal number.

It is an amenable number.

29520394225 is a deficient number, since it is larger than the sum of its proper divisors (13069944272).

29520394225 is an frugal number, since it uses more digits than its factorization.

29520394225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842 (or 4921 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 29520394225 in words is "twenty-nine billion, five hundred twenty million, three hundred ninety-four thousand, two hundred twenty-five".