31226401 has 2 divisors, whose sum is σ = 31226402. Its totient is φ = 31226400.

The previous prime is 31226383. The next prime is 31226411. The reversal of 31226401 is 10462213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 8910225 = 4724^2 + 2985^2 .

It is a cyclic number.

It is not a de Polignac number, because 31226401 - 2⁵ = 31226369 is a prime.

It is not a weakly prime, because it can be changed into another prime (31226411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15613200 + 15613201.

It is an arithmetic number, because the mean of its divisors is an integer number (15613201).

Almost surely, 2^31226401 is an apocalyptic number.

It is an amenable number.

31226401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31226401 is an equidigital number, since it uses as much as digits as its factorization.

31226401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 31226401 is about 5588.0587863765. The cubic root of 31226401 is about 314.9009548352.

Adding to 31226401 its reverse (10462213), we get a palindrome (41688614).

The spelling of 31226401 in words is "thirty-one million, two hundred twenty-six thousand, four hundred one".