31660423503 has 4 divisors (see below), whose sum is σ = 42213898008. Its totient is φ = 21106949000.

The previous prime is 31660423499. The next prime is 31660423511. The reversal of 31660423503 is 30532406613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30532406613 = 3 ⋅10177468871.

It is a cyclic number.

It is not a de Polignac number, because 31660423503 - 2² = 31660423499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31660423523) 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, 5276737248 + ... + 5276737253.

It is an arithmetic number, because the mean of its divisors is an integer number (10553474502).

Almost surely, 2^31660423503 is an apocalyptic number.

31660423503 is a deficient number, since it is larger than the sum of its proper divisors (10553474505).

31660423503 is a wasteful number, since it uses less digits than its factorization.

31660423503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553474504.

The product of its (nonzero) digits is 38880, while the sum is 33.

The spelling of 31660423503 in words is "thirty-one billion, six hundred sixty million, four hundred twenty-three thousand, five hundred three".