35213021 has 4 divisors (see below), whose sum is σ = 35449500. Its totient is φ = 34976544.

The previous prime is 35212997. The next prime is 35213039. The reversal of 35213021 is 12031253.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18156121 + 17056900 = 4261^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 35213021 - 2²² = 31018717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35213081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118016 + ... + 118313.

It is an arithmetic number, because the mean of its divisors is an integer number (8862375).

Almost surely, 2^35213021 is an apocalyptic number.

It is an amenable number.

35213021 is a deficient number, since it is larger than the sum of its proper divisors (236479).

35213021 is a wasteful number, since it uses less digits than its factorization.

35213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236478.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 35213021 is about 5934.0560327654. The cubic root of 35213021 is about 327.7689137973.

Adding to 35213021 its reverse (12031253), we get a palindrome (47244274).

The spelling of 35213021 in words is "thirty-five million, two hundred thirteen thousand, twenty-one".