821151013 has 8 divisors (see below), whose sum is σ = 828027200. Its totient is φ = 814302720.

The previous prime is 821150989. The next prime is 821151029. The reversal of 821151013 is 310151128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821151013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821151613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54373 + ... + 67813.

It is an arithmetic number, because the mean of its divisors is an integer number (103503400).

Almost surely, 2^821151013 is an apocalyptic number.

It is an amenable number.

821151013 is a deficient number, since it is larger than the sum of its proper divisors (6876187).

821151013 is a wasteful number, since it uses less digits than its factorization.

821151013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13947.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 821151013 is about 28655.7326376416. The cubic root of 821151013 is about 936.4278993713.

The spelling of 821151013 in words is "eight hundred twenty-one million, one hundred fifty-one thousand, thirteen".