31030203401 has 2 divisors, whose sum is σ = 31030203402. Its totient is φ = 31030203400.

The previous prime is 31030203397. The next prime is 31030203467. The reversal of 31030203401 is 10430203013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16898700025 + 14131503376 = 129995^2 + 118876^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030203401 - 2² = 31030203397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31030203401.

It is not a weakly prime, because it can be changed into another prime (31030293401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515101700 + 15515101701.

It is an arithmetic number, because the mean of its divisors is an integer number (15515101701).

Almost surely, 2^31030203401 is an apocalyptic number.

It is an amenable number.

31030203401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030203401 is an equidigital number, since it uses as much as digits as its factorization.

31030203401 is an evil number, because the sum of its binary digits is even.

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

Adding to 31030203401 its reverse (10430203013), we get a palindrome (41460406414).

The spelling of 31030203401 in words is "thirty-one billion, thirty million, two hundred three thousand, four hundred one".