31125007 has 2 divisors, whose sum is σ = 31125008. Its totient is φ = 31125006.

The previous prime is 31125001. The next prime is 31125047. The reversal of 31125007 is 70052113.

It is a weak prime.

It is an emirp because it is prime and its reverse (70052113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31125007 - 2³ = 31124999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31125001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562503 + 15562504.

It is an arithmetic number, because the mean of its divisors is an integer number (15562504).

Almost surely, 2^31125007 is an apocalyptic number.

31125007 is a deficient number, since it is larger than the sum of its proper divisors (1).

31125007 is an equidigital number, since it uses as much as digits as its factorization.

31125007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 31125007 is about 5578.9790284603. The cubic root of 31125007 is about 314.5597511593.

The spelling of 31125007 in words is "thirty-one million, one hundred twenty-five thousand, seven".