31071472 has 10 divisors (see below), whose sum is σ = 60201008. Its totient is φ = 15535728.

The previous prime is 31071457. The next prime is 31071487. The reversal of 31071472 is 27417013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31071457) and next prime (31071487).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970968 + ... + 970999.

Almost surely, 2^31071472 is an apocalyptic number.

It is an amenable number.

31071472 is a deficient number, since it is larger than the sum of its proper divisors (29129536).

31071472 is a wasteful number, since it uses less digits than its factorization.

31071472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941975 (or 1941969 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 31071472 is about 5574.1790426932. The cubic root of 31071472 is about 314.3793001110.

Adding to 31071472 its reverse (27417013), we get a palindrome (58488485).

The spelling of 31071472 in words is "thirty-one million, seventy-one thousand, four hundred seventy-two".