31230401 has 2 divisors, whose sum is σ = 31230402. Its totient is φ = 31230400.

The previous prime is 31230391. The next prime is 31230403. The reversal of 31230401 is 10403213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 3940225 = 5224^2 + 1985^2 .

It is an emirp because it is prime and its reverse (10403213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31230401 - 2⁶ = 31230337 is a prime.

Together with 31230403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31230403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615200 + 15615201.

It is an arithmetic number, because the mean of its divisors is an integer number (15615201).

Almost surely, 2^31230401 is an apocalyptic number.

It is an amenable number.

31230401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230401 is an equidigital number, since it uses as much as digits as its factorization.

31230401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31230401 is about 5588.4166809571. The cubic root of 31230401 is about 314.9144001891.

Adding to 31230401 its reverse (10403213), we get a palindrome (41633614).

The spelling of 31230401 in words is "thirty-one million, two hundred thirty thousand, four hundred one".