31274473 has 2 divisors, whose sum is σ = 31274474. Its totient is φ = 31274472.

The previous prime is 31274423. The next prime is 31274479. The reversal of 31274473 is 37447213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24472809 + 6801664 = 4947^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 31274473 - 2⁹ = 31273961 is a prime.

It is a super-2 number, since 2×31274473² = 1956185322855458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31274479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15637236 + 15637237.

It is an arithmetic number, because the mean of its divisors is an integer number (15637237).

Almost surely, 2^31274473 is an apocalyptic number.

It is an amenable number.

31274473 is a deficient number, since it is larger than the sum of its proper divisors (1).

31274473 is an equidigital number, since it uses as much as digits as its factorization.

31274473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 31.

The square root of 31274473 is about 5592.3584470239. The cubic root of 31274473 is about 315.0624651464.

The spelling of 31274473 in words is "thirty-one million, two hundred seventy-four thousand, four hundred seventy-three".