31401887243 has 8 divisors (see below), whose sum is σ = 31944352560. Its totient is φ = 30859763040.

The previous prime is 31401887201. The next prime is 31401887269. The reversal of 31401887243 is 34278810413.

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

It is a cyclic number.

It is not a de Polignac number, because 31401887243 - 2⁸ = 31401886987 is a prime.

It is a super-2 number, since 2×31401887243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31401887243.

It is not an unprimeable number, because it can be changed into a prime (31401887273) 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, 104021 + ... + 271337.

It is an arithmetic number, because the mean of its divisors is an integer number (3993044070).

Almost surely, 2^31401887243 is an apocalyptic number.

31401887243 is a deficient number, since it is larger than the sum of its proper divisors (542465317).

31401887243 is a wasteful number, since it uses less digits than its factorization.

31401887243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170557.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 31401887243 in words is "thirty-one billion, four hundred one million, eight hundred eighty-seven thousand, two hundred forty-three".