40421333 has 4 divisors (see below), whose sum is σ = 41361408. Its totient is φ = 39481260.

The previous prime is 40421323. The next prime is 40421347. The reversal of 40421333 is 33312404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40421333 - 2⁴ = 40421317 is a prime.

It is a super-2 number, since 2×40421333² = 3267768322993778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421323) 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, 469973 + ... + 470058.

It is an arithmetic number, because the mean of its divisors is an integer number (10340352).

Almost surely, 2^40421333 is an apocalyptic number.

40421333 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40421333 is a deficient number, since it is larger than the sum of its proper divisors (940075).

40421333 is an equidigital number, since it uses as much as digits as its factorization.

40421333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940074.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 40421333 is about 6357.7773631986. Note that the first 3 decimals coincide. The cubic root of 40421333 is about 343.1917799182.

Adding to 40421333 its reverse (33312404), we get a palindrome (73733737).

The spelling of 40421333 in words is "forty million, four hundred twenty-one thousand, three hundred thirty-three".