85151251 has 2 divisors, whose sum is σ = 85151252. Its totient is φ = 85151250.

The previous prime is 85151243. The next prime is 85151257. The reversal of 85151251 is 15215158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85151251 - 2³ = 85151243 is a prime.

It is not a weakly prime, because it can be changed into another prime (85151257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42575625 + 42575626.

It is an arithmetic number, because the mean of its divisors is an integer number (42575626).

Almost surely, 2^85151251 is an apocalyptic number.

85151251 is a deficient number, since it is larger than the sum of its proper divisors (1).

85151251 is an equidigital number, since it uses as much as digits as its factorization.

85151251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000, while the sum is 28.

The square root of 85151251 is about 9227.7435486689. The cubic root of 85151251 is about 439.9436067533.

The spelling of 85151251 in words is "eighty-five million, one hundred fifty-one thousand, two hundred fifty-one".