31439144503 has 4 divisors (see below), whose sum is σ = 33857540248. Its totient is φ = 29020748760.

The previous prime is 31439144489. The next prime is 31439144519. The reversal of 31439144503 is 30544193413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31439144503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31439144603) 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, 1209197853 + ... + 1209197878.

It is an arithmetic number, because the mean of its divisors is an integer number (8464385062).

Almost surely, 2^31439144503 is an apocalyptic number.

31439144503 is a deficient number, since it is larger than the sum of its proper divisors (2418395745).

31439144503 is a wasteful number, since it uses less digits than its factorization.

31439144503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418395744.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 31439144503 in words is "thirty-one billion, four hundred thirty-nine million, one hundred forty-four thousand, five hundred three".