731440201 has 4 divisors (see below), whose sum is σ = 733320900. Its totient is φ = 729559504.

The previous prime is 731440189. The next prime is 731440211. The reversal of 731440201 is 102044137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102044137 = 13 ⋅7849549.

It can be written as a sum of positive squares in 2 ways, for example, as 64561225 + 666878976 = 8035^2 + 25824^2 .

It is a cyclic number.

It is not a de Polignac number, because 731440201 - 2¹¹ = 731438153 is a prime.

It is a super-3 number, since 3×731440201³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731440211) 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, 939766 + ... + 940543.

It is an arithmetic number, because the mean of its divisors is an integer number (183330225).

Almost surely, 2^731440201 is an apocalyptic number.

It is an amenable number.

731440201 is a deficient number, since it is larger than the sum of its proper divisors (1880699).

731440201 is a wasteful number, since it uses less digits than its factorization.

731440201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880698.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 731440201 is about 27045.1511550592. The cubic root of 731440201 is about 901.0030795619.

Adding to 731440201 its reverse (102044137), we get a palindrome (833484338).

The spelling of 731440201 in words is "seven hundred thirty-one million, four hundred forty thousand, two hundred one".