400451021422 has 8 divisors (see below), whose sum is σ = 600790723272. Its totient is φ = 200187447000.

The previous prime is 400451021407. The next prime is 400451021441. The reversal of 400451021422 is 224120154004.

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

It is a super-2 number, since 2×400451021422² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19018704 + ... + 19039747.

It is an arithmetic number, because the mean of its divisors is an integer number (75098840409).

Almost surely, 2^400451021422 is an apocalyptic number.

400451021422 is a deficient number, since it is larger than the sum of its proper divisors (200339701850).

400451021422 is a wasteful number, since it uses less digits than its factorization.

400451021422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38063714.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 400451021422 its reverse (224120154004), we get a palindrome (624571175426).

The spelling of 400451021422 in words is "four hundred billion, four hundred fifty-one million, twenty-one thousand, four hundred twenty-two".