52209399 has 16 divisors (see below), whose sum is σ = 77376384. Its totient is φ = 31044000.

The previous prime is 52209371. The next prime is 52209401. The reversal of 52209399 is 99390225.

It is not a de Polignac number, because 52209399 - 2²¹ = 50112247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52209349) 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, 13177 + ... + 16674.

It is an arithmetic number, because the mean of its divisors is an integer number (4836024).

Almost surely, 2^52209399 is an apocalyptic number.

52209399 is a deficient number, since it is larger than the sum of its proper divisors (25166985).

52209399 is a wasteful number, since it uses less digits than its factorization.

52209399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29918.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 52209399 is about 7225.6071717192. The cubic root of 52209399 is about 373.7514601196.

The spelling of 52209399 in words is "fifty-two million, two hundred nine thousand, three hundred ninety-nine".