621544342 has 8 divisors (see below), whose sum is σ = 932510376. Its totient is φ = 310707552.

The previous prime is 621544307. The next prime is 621544373. The reversal of 621544342 is 243445126.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19228 + ... + 40159.

It is an arithmetic number, because the mean of its divisors is an integer number (116563797).

Almost surely, 2^621544342 is an apocalyptic number.

621544342 is a deficient number, since it is larger than the sum of its proper divisors (310966034).

621544342 is a wasteful number, since it uses less digits than its factorization.

621544342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64622.

The product of its digits is 23040, while the sum is 31.

The square root of 621544342 is about 24930.7910424038. The cubic root of 621544342 is about 853.4093023525.

Adding to 621544342 its reverse (243445126), we get a palindrome (864989468).

The spelling of 621544342 in words is "six hundred twenty-one million, five hundred forty-four thousand, three hundred forty-two".