31490443572 has 24 divisors (see below), whose sum is σ = 83974516416. Its totient is φ = 8997269568.

The previous prime is 31490443489. The next prime is 31490443597. The reversal of 31490443572 is 27534409413.

It is a happy number.

It is a super-3 number, since 3×31490443572³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187443033 + ... + 187443200.

It is an arithmetic number, because the mean of its divisors is an integer number (3498938184).

Almost surely, 2^31490443572 is an apocalyptic number.

It is an amenable number.

31490443572 is an abundant number, since it is smaller than the sum of its proper divisors (52484072844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31490443572 is a wasteful number, since it uses less digits than its factorization.

31490443572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374886247 (or 374886245 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 31490443572 in words is "thirty-one billion, four hundred ninety million, four hundred forty-three thousand, five hundred seventy-two".