291214225 has 9 divisors (see below), whose sum is σ = 361211473. Its totient is φ = 232903120.

The previous prime is 291214219. The next prime is 291214243. The reversal of 291214225 is 522412192.

The square root of 291214225 is 17065.

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 44849809 + 246364416 = 6697^2 + 15696^2 .

It is not a de Polignac number, because 291214225 - 2¹⁹ = 290689937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 291214193 and 291214202.

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, 83619 + ... + 87031.

Almost surely, 2^291214225 is an apocalyptic number.

291214225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

291214225 is the 17065-th square number.

291214225 is the 8533-rd centered octagonal number.

It is an amenable number.

291214225 is a deficient number, since it is larger than the sum of its proper divisors (69997248).

291214225 is an frugal number, since it uses more digits than its factorization.

291214225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836 (or 3418 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The cubic root of 291214225 is about 662.8331112274.

The spelling of 291214225 in words is "two hundred ninety-one million, two hundred fourteen thousand, two hundred twenty-five".