622431921 has 8 divisors (see below), whose sum is σ = 830362624. Its totient is φ = 414727920.

The previous prime is 622431917. The next prime is 622431949. The reversal of 622431921 is 129134226.

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

It is not a de Polignac number, because 622431921 - 2² = 622431917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (622431961) 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, 50161 + ... + 61326.

It is an arithmetic number, because the mean of its divisors is an integer number (103795328).

Almost surely, 2^622431921 is an apocalyptic number.

It is an amenable number.

622431921 is a deficient number, since it is larger than the sum of its proper divisors (207930703).

622431921 is a wasteful number, since it uses less digits than its factorization.

622431921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113351.

The product of its digits is 5184, while the sum is 30.

The square root of 622431921 is about 24948.5855510889. The cubic root of 622431921 is about 853.8153382266.

The spelling of 622431921 in words is "six hundred twenty-two million, four hundred thirty-one thousand, nine hundred twenty-one".