31323010403 has 4 divisors (see below), whose sum is σ = 32403114240. Its totient is φ = 30242906568.

The previous prime is 31323010387. The next prime is 31323010423. The reversal of 31323010403 is 30401032313.

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 31323010403 - 2⁴ = 31323010387 is a prime.

It is a super-2 number, since 2×31323010403² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323010423) 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, 540051875 + ... + 540051932.

It is an arithmetic number, because the mean of its divisors is an integer number (8100778560).

Almost surely, 2^31323010403 is an apocalyptic number.

31323010403 is a deficient number, since it is larger than the sum of its proper divisors (1080103837).

31323010403 is a wasteful number, since it uses less digits than its factorization.

31323010403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080103836.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31323010403 its reverse (30401032313), we get a palindrome (61724042716).

The spelling of 31323010403 in words is "thirty-one billion, three hundred twenty-three million, ten thousand, four hundred three".