523621587021 has 8 divisors (see below), whose sum is σ = 751866894240. Its totient is φ = 322228668912.

The previous prime is 523621587017. The next prime is 523621587169. The reversal of 523621587021 is 120785126325.

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

It is not a de Polignac number, because 523621587021 - 2² = 523621587017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523621587001) 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, 6713097231 + ... + 6713097308.

It is an arithmetic number, because the mean of its divisors is an integer number (93983361780).

Almost surely, 2^523621587021 is an apocalyptic number.

It is an amenable number.

523621587021 is a deficient number, since it is larger than the sum of its proper divisors (228245307219).

523621587021 is a wasteful number, since it uses less digits than its factorization.

523621587021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13426194555.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 523621587021 in words is "five hundred twenty-three billion, six hundred twenty-one million, five hundred eighty-seven thousand, twenty-one".