31321263272 has 32 divisors (see below), whose sum is σ = 63264983880. Its totient is φ = 14451367680.

The previous prime is 31321263257. The next prime is 31321263277. The reversal of 31321263272 is 27236212313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26235576676 + 5085686596 = 161974^2 + 71314^2 .

It is a super-2 number, since 2×31321263272² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31321263277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292022 + ... + 384602.

Almost surely, 2^31321263272 is an apocalyptic number.

It is an amenable number.

31321263272 is an abundant number, since it is smaller than the sum of its proper divisors (31943720608).

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

31321263272 is a wasteful number, since it uses less digits than its factorization.

31321263272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95853 (or 95849 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

Adding to 31321263272 its reverse (27236212313), we get a palindrome (58557475585).

The spelling of 31321263272 in words is "thirty-one billion, three hundred twenty-one million, two hundred sixty-three thousand, two hundred seventy-two".