31233401 has 2 divisors, whose sum is σ = 31233402. Its totient is φ = 31233400.

The previous prime is 31233373. The next prime is 31233409. The reversal of 31233401 is 10433213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 10394176 = 4565^2 + 3224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31233401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31233401.

It is not a weakly prime, because it can be changed into another prime (31233409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616700 + 15616701.

It is an arithmetic number, because the mean of its divisors is an integer number (15616701).

Almost surely, 2^31233401 is an apocalyptic number.

It is an amenable number.

31233401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233401 is an equidigital number, since it uses as much as digits as its factorization.

31233401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31233401 is about 5588.6850868518. The cubic root of 31233401 is about 314.9244834512.

Adding to 31233401 its reverse (10433213), we get a palindrome (41666614).

The spelling of 31233401 in words is "thirty-one million, two hundred thirty-three thousand, four hundred one".