31315069 has 2 divisors, whose sum is σ = 31315070. Its totient is φ = 31315068.

The previous prime is 31315013. The next prime is 31315079. The reversal of 31315069 is 96051313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 11628100 = 4437^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 31315069 - 2¹⁵ = 31282301 is a prime.

It is a super-2 number, since 2×31315069² = 1961267092949522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31315079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657534 + 15657535.

It is an arithmetic number, because the mean of its divisors is an integer number (15657535).

Almost surely, 2^31315069 is an apocalyptic number.

It is an amenable number.

31315069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31315069 is an equidigital number, since it uses as much as digits as its factorization.

31315069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 31315069 is about 5595.9868656029. The cubic root of 31315069 is about 315.1987290536.

The spelling of 31315069 in words is "thirty-one million, three hundred fifteen thousand, sixty-nine".