31225567 has 2 divisors, whose sum is σ = 31225568. Its totient is φ = 31225566.

The previous prime is 31225541. The next prime is 31225603. The reversal of 31225567 is 76552213.

It is a weak prime.

It is an emirp because it is prime and its reverse (76552213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31225567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31225507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612783 + 15612784.

It is an arithmetic number, because the mean of its divisors is an integer number (15612784).

Almost surely, 2^31225567 is an apocalyptic number.

31225567 is a deficient number, since it is larger than the sum of its proper divisors (1).

31225567 is an equidigital number, since it uses as much as digits as its factorization.

31225567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 31225567 is about 5587.9841624686. The cubic root of 31225567 is about 314.8981513343.

The spelling of 31225567 in words is "thirty-one million, two hundred twenty-five thousand, five hundred sixty-seven".