207240253 has 4 divisors (see below), whose sum is σ = 226080288. Its totient is φ = 188400220.

The previous prime is 207240233. The next prime is 207240269. The reversal of 207240253 is 352042702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 207240253 - 2⁵ = 207240221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207240233) 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, 9420001 + ... + 9420022.

It is an arithmetic number, because the mean of its divisors is an integer number (56520072).

Almost surely, 2^207240253 is an apocalyptic number.

It is an amenable number.

207240253 is a deficient number, since it is larger than the sum of its proper divisors (18840035).

207240253 is a wasteful number, since it uses less digits than its factorization.

207240253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18840034.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 207240253 is about 14395.8415176050. The cubic root of 207240253 is about 591.7769401374.

Adding to 207240253 its reverse (352042702), we get a palindrome (559282955).

The spelling of 207240253 in words is "two hundred seven million, two hundred forty thousand, two hundred fifty-three".