36305821 has 2 divisors, whose sum is σ = 36305822. Its totient is φ = 36305820.

The previous prime is 36305791. The next prime is 36305833. The reversal of 36305821 is 12850363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 9369721 = 5190^2 + 3061^2 .

It is an emirp because it is prime and its reverse (12850363) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36305821 is a prime.

It is a super-2 number, since 2×36305821² = 2636225276968082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 36305821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36305861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18152910 + 18152911.

It is an arithmetic number, because the mean of its divisors is an integer number (18152911).

Almost surely, 2^36305821 is an apocalyptic number.

It is an amenable number.

36305821 is a deficient number, since it is larger than the sum of its proper divisors (1).

36305821 is an equidigital number, since it uses as much as digits as its factorization.

36305821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 36305821 is about 6025.4311878902. The cubic root of 36305821 is about 331.1250884909.

The spelling of 36305821 in words is "thirty-six million, three hundred five thousand, eight hundred twenty-one".