31065149 has 2 divisors, whose sum is σ = 31065150. Its totient is φ = 31065148.

The previous prime is 31065113. The next prime is 31065179. The reversal of 31065149 is 94156013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30880249 + 184900 = 5557^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 31065149 - 2¹⁶ = 30999613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31065179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15532574 + 15532575.

It is an arithmetic number, because the mean of its divisors is an integer number (15532575).

Almost surely, 2^31065149 is an apocalyptic number.

It is an amenable number.

31065149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31065149 is an equidigital number, since it uses as much as digits as its factorization.

31065149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 31065149 is about 5573.6118451144. The cubic root of 31065149 is about 314.3579734187.

It can be divided in two parts, 310 and 65149, that multiplied together give a triangular number (20196190 = T₆₃₅₅).

The spelling of 31065149 in words is "thirty-one million, sixty-five thousand, one hundred forty-nine".