31462172440 has 32 divisors (see below), whose sum is σ = 71989722000. Its totient is φ = 12371565184.

The previous prime is 31462172411. The next prime is 31462172449. The reversal of 31462172440 is 4427126413.

It is a junction number, because it is equal to n+sod(n) for n = 31462172396 and 31462172405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31462172449) by changing a digit.

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, 6663355 + ... + 6668074.

Almost surely, 2^31462172440 is an apocalyptic number.

It is an amenable number.

31462172440 is an abundant number, since it is smaller than the sum of its proper divisors (40527549560).

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

31462172440 is a wasteful number, since it uses less digits than its factorization.

31462172440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13331499 (or 13331495 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 31462172440 its reverse (4427126413), we get a palindrome (35889298853).

The spelling of 31462172440 in words is "thirty-one billion, four hundred sixty-two million, one hundred seventy-two thousand, four hundred forty".