53209131 has 4 divisors (see below), whose sum is σ = 70945512. Its totient is φ = 35472752.

The previous prime is 53209129. The next prime is 53209147. The reversal of 53209131 is 13190235.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53209131 - 2¹ = 53209129 is a prime.

It is a super-2 number, since 2×53209131² = 5662423243550322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53209111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8868186 + ... + 8868191.

It is an arithmetic number, because the mean of its divisors is an integer number (17736378).

Almost surely, 2^53209131 is an apocalyptic number.

53209131 is a deficient number, since it is larger than the sum of its proper divisors (17736381).

53209131 is a wasteful number, since it uses less digits than its factorization.

53209131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736380.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 53209131 is about 7294.4589244165. The cubic root of 53209131 is about 376.1219872598.

Adding to 53209131 its reverse (13190235), we get a palindrome (66399366).

The spelling of 53209131 in words is "fifty-three million, two hundred nine thousand, one hundred thirty-one".