31474481 has 2 divisors, whose sum is σ = 31474482. Its totient is φ = 31474480.

The previous prime is 31474433. The next prime is 31474489. The reversal of 31474481 is 18447413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28718881 + 2755600 = 5359^2 + 1660^2 .

It is an emirp because it is prime and its reverse (18447413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31474481 - 2¹⁰ = 31473457 is a prime.

It is a super-2 number, since 2×31474481² = 1981285908438722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31474489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15737240 + 15737241.

It is an arithmetic number, because the mean of its divisors is an integer number (15737241).

Almost surely, 2^31474481 is an apocalyptic number.

It is an amenable number.

31474481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31474481 is an equidigital number, since it uses as much as digits as its factorization.

31474481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 31474481 is about 5610.2122063252. The cubic root of 31474481 is about 315.7326726196.

The spelling of 31474481 in words is "thirty-one million, four hundred seventy-four thousand, four hundred eighty-one".