31489918471 has 16 divisors (see below), whose sum is σ = 34751225376. Its totient is φ = 28296000000.

The previous prime is 31489918457. The next prime is 31489918483. The reversal of 31489918471 is 17481998413.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31489918471 - 2⁹ = 31489917959 is a prime.

It is a super-3 number, since 3×31489918471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489919471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644131 + ... + 691291.

It is an arithmetic number, because the mean of its divisors is an integer number (2171951586).

Almost surely, 2^31489918471 is an apocalyptic number.

31489918471 is a deficient number, since it is larger than the sum of its proper divisors (3261306905).

31489918471 is a wasteful number, since it uses less digits than its factorization.

31489918471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47874.

The product of its digits is 1741824, while the sum is 55.

The spelling of 31489918471 in words is "thirty-one billion, four hundred eighty-nine million, nine hundred eighteen thousand, four hundred seventy-one".