202397431 has 4 divisors (see below), whose sum is σ = 207104392. Its totient is φ = 197690472.

The previous prime is 202397411. The next prime is 202397449. The reversal of 202397431 is 134793202.

202397431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202397431 - 2⁵ = 202397399 is a prime.

It is a super-2 number, since 2×202397431² = 81929440150799522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202397393 and 202397402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202397411) 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, 2353416 + ... + 2353501.

It is an arithmetic number, because the mean of its divisors is an integer number (51776098).

Almost surely, 2^202397431 is an apocalyptic number.

202397431 is a deficient number, since it is larger than the sum of its proper divisors (4706961).

202397431 is an equidigital number, since it uses as much as digits as its factorization.

202397431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706960.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 202397431 is about 14226.6451069815. The cubic root of 202397431 is about 587.1309827496.

The spelling of 202397431 in words is "two hundred two million, three hundred ninety-seven thousand, four hundred thirty-one".