85554731 has 2 divisors, whose sum is σ = 85554732. Its totient is φ = 85554730.

The previous prime is 85554713. The next prime is 85554809. The reversal of 85554731 is 13745558.

Together with previous prime (85554713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85554731 is a prime.

It is a super-2 number, since 2×85554731² = 14639223992964722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85551731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777365 + 42777366.

It is an arithmetic number, because the mean of its divisors is an integer number (42777366).

Almost surely, 2^85554731 is an apocalyptic number.

85554731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85554731 is an equidigital number, since it uses as much as digits as its factorization.

85554731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 85554731 is about 9249.5800445209. The cubic root of 85554731 is about 440.6373871809.

The spelling of 85554731 in words is "eighty-five million, five hundred fifty-four thousand, seven hundred thirty-one".