31219104401 has 2 divisors, whose sum is σ = 31219104402. Its totient is φ = 31219104400.

The previous prime is 31219104377. The next prime is 31219104407. The reversal of 31219104401 is 10440191213.

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., 23723700625 + 7495403776 = 154025^2 + 86576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31219104401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31219104407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15609552200 + 15609552201.

It is an arithmetic number, because the mean of its divisors is an integer number (15609552201).

Almost surely, 2^31219104401 is an apocalyptic number.

It is an amenable number.

31219104401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31219104401 is an equidigital number, since it uses as much as digits as its factorization.

31219104401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 31219104401 its reverse (10440191213), we get a palindrome (41659295614).

The spelling of 31219104401 in words is "thirty-one billion, two hundred nineteen million, one hundred four thousand, four hundred one".