35851021 has 2 divisors, whose sum is σ = 35851022. Its totient is φ = 35851020.

The previous prime is 35851009. The next prime is 35851027. The reversal of 35851021 is 12015853.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32661225 + 3189796 = 5715^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 35851021 - 2²¹ = 33753869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35851027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17925510 + 17925511.

It is an arithmetic number, because the mean of its divisors is an integer number (17925511).

Almost surely, 2^35851021 is an apocalyptic number.

It is an amenable number.

35851021 is a deficient number, since it is larger than the sum of its proper divisors (1).

35851021 is an equidigital number, since it uses as much as digits as its factorization.

35851021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 35851021 is about 5987.5722125082. The cubic root of 35851021 is about 329.7366156740.

Adding to 35851021 its reverse (12015853), we get a palindrome (47866874).

The spelling of 35851021 in words is "thirty-five million, eight hundred fifty-one thousand, twenty-one".