31301030310103 has 4 divisors (see below), whose sum is σ = 31578030578448. Its totient is φ = 31024030041760.

The previous prime is 31301030310091. The next prime is 31301030310149. The reversal of 31301030310103 is 30101303010313.

It is a happy number.

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 31301030310103 - 2²⁵ = 31300996755671 is a prime.

It is a super-3 number, since 3×31301030310103³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301030310503) 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, 138500134003 + ... + 138500134228.

It is an arithmetic number, because the mean of its divisors is an integer number (7894507644612).

Almost surely, 2^{31301030310103} is an apocalyptic number.

31301030310103 is a deficient number, since it is larger than the sum of its proper divisors (277000268345).

31301030310103 is a wasteful number, since it uses less digits than its factorization.

31301030310103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277000268344.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31301030310103 its reverse (30101303010313), we get a palindrome (61402333320416).

The spelling of 31301030310103 in words is "thirty-one trillion, three hundred one billion, thirty million, three hundred ten thousand, one hundred three".