31261240003403 has 4 divisors (see below), whose sum is σ = 31271123421048. Its totient is φ = 31251356585760.

The previous prime is 31261240003361. The next prime is 31261240003421. The reversal of 31261240003403 is 30430004216213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31261240003403 - 2¹² = 31261239999307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31261240003423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4941704078 + ... + 4941710403.

It is an arithmetic number, because the mean of its divisors is an integer number (7817780855262).

Almost surely, 2^{31261240003403} is an apocalyptic number.

31261240003403 is a deficient number, since it is larger than the sum of its proper divisors (9883417645).

31261240003403 is an equidigital number, since it uses as much as digits as its factorization.

31261240003403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883417644.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31261240003403 its reverse (30430004216213), we get a palindrome (61691244219616).

The spelling of 31261240003403 in words is "thirty-one trillion, two hundred sixty-one billion, two hundred forty million, three thousand, four hundred three".