52212209 has 16 divisors (see below), whose sum is σ = 64982400. Its totient is φ = 40932864.

The previous prime is 52212203. The next prime is 52212211. The reversal of 52212209 is 90221225.

It is not a de Polignac number, because 52212209 - 2⁸ = 52211953 is a prime.

It is a super-2 number, since 2×52212209² = 5452229537319362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52212203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2912 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (4061400).

Almost surely, 2^52212209 is an apocalyptic number.

It is an amenable number.

52212209 is a deficient number, since it is larger than the sum of its proper divisors (12770191).

52212209 is a wasteful number, since it uses less digits than its factorization.

52212209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13592.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 52212209 is about 7225.8016164298. The cubic root of 52212209 is about 373.7581653157.

The spelling of 52212209 in words is "fifty-two million, two hundred twelve thousand, two hundred nine".