31203434401 has 4 divisors (see below), whose sum is σ = 31205692672. Its totient is φ = 31201176132.

The previous prime is 31203434389. The next prime is 31203434461. The reversal of 31203434401 is 10443430213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31203434401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203434461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108281 + ... + 1136086.

It is an arithmetic number, because the mean of its divisors is an integer number (7801423168).

Almost surely, 2^31203434401 is an apocalyptic number.

It is an amenable number.

31203434401 is a deficient number, since it is larger than the sum of its proper divisors (2258271).

31203434401 is a wasteful number, since it uses less digits than its factorization.

31203434401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258270.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31203434401 its reverse (10443430213), we get a palindrome (41646864614).

The spelling of 31203434401 in words is "thirty-one billion, two hundred three million, four hundred thirty-four thousand, four hundred one".