35820521 has 4 divisors (see below), whose sum is σ = 39076944. Its totient is φ = 32564100.

The previous prime is 35820517. The next prime is 35820557. The reversal of 35820521 is 12502853.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12502853 = 11 ⋅1136623.

It is a cyclic number.

It is not a de Polignac number, because 35820521 - 2² = 35820517 is a prime.

It is a super-2 number, since 2×35820521² = 2566219449422882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35820571) 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, 1628195 + ... + 1628216.

It is an arithmetic number, because the mean of its divisors is an integer number (9769236).

Almost surely, 2^35820521 is an apocalyptic number.

It is an amenable number.

35820521 is a deficient number, since it is larger than the sum of its proper divisors (3256423).

35820521 is a wasteful number, since it uses less digits than its factorization.

35820521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256422.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 35820521 is about 5985.0247284368. The cubic root of 35820521 is about 329.6430821212.

The spelling of 35820521 in words is "thirty-five million, eight hundred twenty thousand, five hundred twenty-one".