85572551 has 2 divisors, whose sum is σ = 85572552. Its totient is φ = 85572550.

The previous prime is 85572511. The next prime is 85572559. The reversal of 85572551 is 15527558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85572551 is a prime.

It is a super-2 number, since 2×85572551² = 14645322969295202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85572559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42786275 + 42786276.

It is an arithmetic number, because the mean of its divisors is an integer number (42786276).

Almost surely, 2^85572551 is an apocalyptic number.

85572551 is a deficient number, since it is larger than the sum of its proper divisors (1).

85572551 is an equidigital number, since it uses as much as digits as its factorization.

85572551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 38.

The square root of 85572551 is about 9250.5432813430. The cubic root of 85572551 is about 440.6679781762.

The spelling of 85572551 in words is "eighty-five million, five hundred seventy-two thousand, five hundred fifty-one".