31416461 has 2 divisors, whose sum is σ = 31416462. Its totient is φ = 31416460.

The previous prime is 31416433. The next prime is 31416479. The reversal of 31416461 is 16461413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 13734436 = 4205^2 + 3706^2 .

It is a cyclic number.

It is not a de Polignac number, because 31416461 - 2¹⁰ = 31415437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31416461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31416421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15708230 + 15708231.

It is an arithmetic number, because the mean of its divisors is an integer number (15708231).

Almost surely, 2^31416461 is an apocalyptic number.

It is an amenable number.

31416461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31416461 is an equidigital number, since it uses as much as digits as its factorization.

31416461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 31416461 is about 5605.0388937098. The cubic root of 31416461 is about 315.5385462786.

Adding to 31416461 its reverse (16461413), we get a palindrome (47877874).

The spelling of 31416461 in words is "thirty-one million, four hundred sixteen thousand, four hundred sixty-one".