31381482 has 32 divisors (see below), whose sum is σ = 70144704. Its totient is φ = 9276800.

The previous prime is 31381433. The next prime is 31381487. The reversal of 31381482 is 28418313.

It is not an unprimeable number, because it can be changed into a prime (31381487) 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, 3093 + ... + 8504.

It is an arithmetic number, because the mean of its divisors is an integer number (2192022).

Almost surely, 2^31381482 is an apocalyptic number.

31381482 is an abundant number, since it is smaller than the sum of its proper divisors (38763222).

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

31381482 is a wasteful number, since it uses less digits than its factorization.

31381482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11654.

The product of its digits is 4608, while the sum is 30.

The square root of 31381482 is about 5601.9177073570. The cubic root of 31381482 is about 315.4213962107.

Adding to 31381482 its reverse (28418313), we get a palindrome (59799795).

The spelling of 31381482 in words is "thirty-one million, three hundred eighty-one thousand, four hundred eighty-two".