351073864021 has 4 divisors (see below), whose sum is σ = 351323030700. Its totient is φ = 350824697344.

The previous prime is 351073864003. The next prime is 351073864033. The reversal of 351073864021 is 120468370153.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79800600100 + 271273263921 = 282490^2 + 520839^2 .

It is a cyclic number.

It is not a de Polignac number, because 351073864021 - 2²³ = 351065475413 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 (351073804021) 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, 124581226 + ... + 124584043.

It is an arithmetic number, because the mean of its divisors is an integer number (87830757675).

Almost surely, 2^351073864021 is an apocalyptic number.

It is an amenable number.

351073864021 is a deficient number, since it is larger than the sum of its proper divisors (249166679).

351073864021 is a wasteful number, since it uses less digits than its factorization.

351073864021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249166678.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 351073864021 in words is "three hundred fifty-one billion, seventy-three million, eight hundred sixty-four thousand, twenty-one".