332400021 has 8 divisors (see below), whose sum is σ = 446690304. Its totient is φ = 219854880.

The previous prime is 332400007. The next prime is 332400023. The reversal of 332400021 is 120004233.

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

It is not a de Polignac number, because 332400021 - 2¹⁴ = 332383637 is a prime.

It is a super-2 number, since 2×332400021² = 220979547921600882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (332400023) 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, 435840 + ... + 436601.

It is an arithmetic number, because the mean of its divisors is an integer number (55836288).

Almost surely, 2^332400021 is an apocalyptic number.

It is an amenable number.

332400021 is a deficient number, since it is larger than the sum of its proper divisors (114290283).

332400021 is a wasteful number, since it uses less digits than its factorization.

332400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872571.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 332400021 is about 18231.8408560408. The cubic root of 332400021 is about 692.7135468131.

Adding to 332400021 its reverse (120004233), we get a palindrome (452404254).

The spelling of 332400021 in words is "three hundred thirty-two million, four hundred thousand, twenty-one".