4345551021 has 16 divisors (see below), whose sum is σ = 6633091584. Its totient is φ = 2478934704.

The previous prime is 4345551019. The next prime is 4345551031. The reversal of 4345551021 is 1201555434.

4345551021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4345551021 - 2¹ = 4345551019 is a prime.

It is a super-2 number, since 2×4345551021² = 37767627352228284882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4345551021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4345551011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163935 + ... + 188588.

It is an arithmetic number, because the mean of its divisors is an integer number (414568224).

Almost surely, 2^4345551021 is an apocalyptic number.

It is an amenable number.

4345551021 is a deficient number, since it is larger than the sum of its proper divisors (2287540563).

4345551021 is a wasteful number, since it uses less digits than its factorization.

4345551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353120.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 4345551021 is about 65920.7935404300. The cubic root of 4345551021 is about 1631.8551927066.

The spelling of 4345551021 in words is "four billion, three hundred forty-five million, five hundred fifty-one thousand, twenty-one".