201431297 has 4 divisors (see below), whose sum is σ = 203694660. Its totient is φ = 199167936.

The previous prime is 201431287. The next prime is 201431311. The reversal of 201431297 is 792134102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 792134102 = 2 ⋅396067051.

It can be written as a sum of positive squares in 2 ways, for example, as 23902321 + 177528976 = 4889^2 + 13324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201431297 is a prime.

It is a super-2 number, since 2×201431297² = 81149134822204418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201431257) 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, 1131548 + ... + 1131725.

It is an arithmetic number, because the mean of its divisors is an integer number (50923665).

Almost surely, 2^201431297 is an apocalyptic number.

It is an amenable number.

201431297 is a deficient number, since it is larger than the sum of its proper divisors (2263363).

201431297 is an equidigital number, since it uses as much as digits as its factorization.

201431297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263362.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 201431297 is about 14192.6494003058. The cubic root of 201431297 is about 586.1952788746.

Adding to 201431297 its reverse (792134102), we get a palindrome (993565399).

The spelling of 201431297 in words is "two hundred one million, four hundred thirty-one thousand, two hundred ninety-seven".