31503043011 has 16 divisors (see below), whose sum is σ = 45825575040. Its totient is φ = 19091517120.

The previous prime is 31503042971. The next prime is 31503043021. The reversal of 31503043011 is 11034030513.

It is not a de Polignac number, because 31503043011 - 2¹⁰ = 31503041987 is a prime.

It is a super-2 number, since 2×31503043011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31503043021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979756 + ... + 1011398.

It is an arithmetic number, because the mean of its divisors is an integer number (2864098440).

Almost surely, 2^31503043011 is an apocalyptic number.

31503043011 is a deficient number, since it is larger than the sum of its proper divisors (14322532029).

31503043011 is a wasteful number, since it uses less digits than its factorization.

31503043011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61826.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 31503043011 its reverse (11034030513), we get a palindrome (42537073524).

The spelling of 31503043011 in words is "thirty-one billion, five hundred three million, forty-three thousand, eleven".