85022261 has 2 divisors, whose sum is σ = 85022262. Its totient is φ = 85022260.

The previous prime is 85022257. The next prime is 85022281. The reversal of 85022261 is 16222058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 6345361 = 8870^2 + 2519^2 .

It is a cyclic number.

It is not a de Polignac number, because 85022261 - 2² = 85022257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85022261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85022221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42511130 + 42511131.

It is an arithmetic number, because the mean of its divisors is an integer number (42511131).

Almost surely, 2^85022261 is an apocalyptic number.

It is an amenable number.

85022261 is a deficient number, since it is larger than the sum of its proper divisors (1).

85022261 is an equidigital number, since it uses as much as digits as its factorization.

85022261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 85022261 is about 9220.7516504892. The cubic root of 85022261 is about 439.7213473264.

The spelling of 85022261 in words is "eighty-five million, twenty-two thousand, two hundred sixty-one".