31471132 has 54 divisors (see below), whose sum is σ = 70472976. Its totient is φ = 12252240.

The previous prime is 31471123. The next prime is 31471147. The reversal of 31471132 is 23117413.

It is a super-2 number, since 2×31471132² = 1980864298722848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23053 + ... + 24379.

Almost surely, 2^31471132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31471132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35236488).

31471132 is an abundant number, since it is smaller than the sum of its proper divisors (39001844).

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

31471132 is a wasteful number, since it uses less digits than its factorization.

31471132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1347 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 31471132 is about 5609.9137248268. The cubic root of 31471132 is about 315.7214738516.

Adding to 31471132 its reverse (23117413), we get a palindrome (54588545).

The spelling of 31471132 in words is "thirty-one million, four hundred seventy-one thousand, one hundred thirty-two".