31472263 has 4 divisors (see below), whose sum is σ = 31528728. Its totient is φ = 31415800.

The previous prime is 31472261. The next prime is 31472291. The reversal of 31472263 is 36227413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36227413 = 149 ⋅243137.

It is a cyclic number.

It is not a de Polignac number, because 31472263 - 2¹ = 31472261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31472261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27388 + ... + 28513.

It is an arithmetic number, because the mean of its divisors is an integer number (7882182).

Almost surely, 2^31472263 is an apocalyptic number.

31472263 is a deficient number, since it is larger than the sum of its proper divisors (56465).

31472263 is an equidigital number, since it uses as much as digits as its factorization.

31472263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56464.

The product of its digits is 6048, while the sum is 28.

The square root of 31472263 is about 5610.0145276104. The cubic root of 31472263 is about 315.7252559072.

Adding to 31472263 its reverse (36227413), we get a palindrome (67699676).

The spelling of 31472263 in words is "thirty-one million, four hundred seventy-two thousand, two hundred sixty-three".