31474213 has 2 divisors, whose sum is σ = 31474214. Its totient is φ = 31474212.

The previous prime is 31474171. The next prime is 31474217. The reversal of 31474213 is 31247413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31382404 + 91809 = 5602^2 + 303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31474213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31474217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15737106 + 15737107.

It is an arithmetic number, because the mean of its divisors is an integer number (15737107).

Almost surely, 2^31474213 is an apocalyptic number.

It is an amenable number.

31474213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31474213 is an equidigital number, since it uses as much as digits as its factorization.

31474213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 31474213 is about 5610.1883212598. The cubic root of 31474213 is about 315.7317764799.

The spelling of 31474213 in words is "thirty-one million, four hundred seventy-four thousand, two hundred thirteen".