2021355523 has 8 divisors (see below), whose sum is σ = 2231683776. Its totient is φ = 1815455400.

The previous prime is 2021355503. The next prime is 2021355563. The reversal of 2021355523 is 3255531202.

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

It is not a de Polignac number, because 2021355523 - 2⁵ = 2021355491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021355491 and 2021355500.

It is not an unprimeable number, because it can be changed into a prime (2021355503) 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, 1106073 + ... + 1107898.

It is an arithmetic number, because the mean of its divisors is an integer number (278960472).

Almost surely, 2^2021355523 is an apocalyptic number.

2021355523 is a deficient number, since it is larger than the sum of its proper divisors (210328253).

2021355523 is a wasteful number, since it uses less digits than its factorization.

2021355523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214065.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 2021355523 is about 44959.4875749268. The cubic root of 2021355523 is about 1264.3895616925.

Adding to 2021355523 its reverse (3255531202), we get a palindrome (5276886725).

The spelling of 2021355523 in words is "two billion, twenty-one million, three hundred fifty-five thousand, five hundred twenty-three".