400332353021 has 8 divisors (see below), whose sum is σ = 407155084800. Its totient is φ = 393510869280.

The previous prime is 400332353009. The next prime is 400332353039. The reversal of 400332353021 is 120353233004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400332353021 - 2¹⁰ = 400332351997 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 (400332353081) 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, 346745 + ... + 959633.

It is an arithmetic number, because the mean of its divisors is an integer number (50894385600).

Almost surely, 2^400332353021 is an apocalyptic number.

It is an amenable number.

400332353021 is a deficient number, since it is larger than the sum of its proper divisors (6822731779).

400332353021 is a wasteful number, since it uses less digits than its factorization.

400332353021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624019.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 400332353021 its reverse (120353233004), we get a palindrome (520685586025).

The spelling of 400332353021 in words is "four hundred billion, three hundred thirty-two million, three hundred fifty-three thousand, twenty-one".