31248859 has 2 divisors, whose sum is σ = 31248860. Its totient is φ = 31248858.

The previous prime is 31248857. The next prime is 31248947. The reversal of 31248859 is 95884213.

It is a weak prime.

It is an emirp because it is prime and its reverse (95884213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31248859 - 2¹ = 31248857 is a prime.

Together with 31248857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31248851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624429 + 15624430.

It is an arithmetic number, because the mean of its divisors is an integer number (15624430).

Almost surely, 2^31248859 is an apocalyptic number.

31248859 is a deficient number, since it is larger than the sum of its proper divisors (1).

31248859 is an equidigital number, since it uses as much as digits as its factorization.

31248859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 31248859 is about 5590.0678886754. The cubic root of 31248859 is about 314.9764289073.

The spelling of 31248859 in words is "thirty-one million, two hundred forty-eight thousand, eight hundred fifty-nine".