31401413 has 4 divisors (see below), whose sum is σ = 31601580. Its totient is φ = 31201248.

The previous prime is 31401407. The next prime is 31401439. The reversal of 31401413 is 31410413.

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 5166529 + 26234884 = 2273^2 + 5122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31401413 is a prime.

It is a Duffinian number.

31401413 is a modest number, since divided by 1413 gives 314 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 31401391 and 31401400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401313) 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, 99848 + ... + 100161.

It is an arithmetic number, because the mean of its divisors is an integer number (7900395).

Almost surely, 2^31401413 is an apocalyptic number.

It is an amenable number.

31401413 is a deficient number, since it is larger than the sum of its proper divisors (200167).

31401413 is a wasteful number, since it uses less digits than its factorization.

31401413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200166.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31401413 is about 5603.6963693619. The cubic root of 31401413 is about 315.4881588680.

Adding to 31401413 its reverse (31410413), we get a palindrome (62811826).

The spelling of 31401413 in words is "thirty-one million, four hundred one thousand, four hundred thirteen".