31298401 has 4 divisors (see below), whose sum is σ = 31575492. Its totient is φ = 31021312.

The previous prime is 31298357. The next prime is 31298413. The reversal of 31298401 is 10489213.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 16483600 = 3849^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 31298401 - 2¹⁷ = 31167329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31298401.

It is not an unprimeable number, because it can be changed into a prime (31298431) 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, 138376 + ... + 138601.

It is an arithmetic number, because the mean of its divisors is an integer number (7893873).

Almost surely, 2^31298401 is an apocalyptic number.

It is an amenable number.

31298401 is a deficient number, since it is larger than the sum of its proper divisors (277091).

31298401 is a wasteful number, since it uses less digits than its factorization.

31298401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277090.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 31298401 is about 5594.4973858248. The cubic root of 31298401 is about 315.1427957603.

The spelling of 31298401 in words is "thirty-one million, two hundred ninety-eight thousand, four hundred one".