36257821 has 16 divisors (see below), whose sum is σ = 40932864. Its totient is φ = 31930624.

The previous prime is 36257813. The next prime is 36257827. The reversal of 36257821 is 12875263.

It is a happy number.

It is not a de Polignac number, because 36257821 - 2³ = 36257813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36257827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17391 + ... + 19363.

It is an arithmetic number, because the mean of its divisors is an integer number (2558304).

Almost surely, 2^36257821 is an apocalyptic number.

It is an amenable number.

36257821 is a deficient number, since it is larger than the sum of its proper divisors (4675043).

36257821 is a wasteful number, since it uses less digits than its factorization.

36257821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060.

The product of its digits is 20160, while the sum is 34.

The square root of 36257821 is about 6021.4467530652. The cubic root of 36257821 is about 330.9790970818.

The spelling of 36257821 in words is "thirty-six million, two hundred fifty-seven thousand, eight hundred twenty-one".