85983551 has 2 divisors, whose sum is σ = 85983552. Its totient is φ = 85983550.

The previous prime is 85983509. The next prime is 85983559. The reversal of 85983551 is 15538958.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85983551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85983559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42991775 + 42991776.

It is an arithmetic number, because the mean of its divisors is an integer number (42991776).

Almost surely, 2^85983551 is an apocalyptic number.

85983551 is a deficient number, since it is larger than the sum of its proper divisors (1).

85983551 is an equidigital number, since it uses as much as digits as its factorization.

85983551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 44.

The square root of 85983551 is about 9272.7315824411. The cubic root of 85983551 is about 441.3723526019.

The spelling of 85983551 in words is "eighty-five million, nine hundred eighty-three thousand, five hundred fifty-one".