31189221043 has 8 divisors (see below), whose sum is σ = 31400522208. Its totient is φ = 30978455424.

The previous prime is 31189220981. The next prime is 31189221079. The reversal of 31189221043 is 34012298113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31189221043 is a prime.

It is a super-2 number, since 2×31189221043² (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 (31189224043) 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 7 ways as a sum of consecutive naturals, for example, 16671 + ... + 250312.

It is an arithmetic number, because the mean of its divisors is an integer number (3925065276).

Almost surely, 2^31189221043 is an apocalyptic number.

31189221043 is a deficient number, since it is larger than the sum of its proper divisors (211301165).

31189221043 is a wasteful number, since it uses less digits than its factorization.

31189221043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267773.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 31189221043 in words is "thirty-one billion, one hundred eighty-nine million, two hundred twenty-one thousand, forty-three".