622172157 has 8 divisors (see below), whose sum is σ = 873224160. Its totient is φ = 392950800.

The previous prime is 622172153. The next prime is 622172179. The reversal of 622172157 is 751271226.

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

It is not a de Polignac number, because 622172157 - 2² = 622172153 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622172153) 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, 5457594 + ... + 5457707.

It is an arithmetic number, because the mean of its divisors is an integer number (109153020).

Almost surely, 2^622172157 is an apocalyptic number.

It is an amenable number.

622172157 is a deficient number, since it is larger than the sum of its proper divisors (251052003).

622172157 is a wasteful number, since it uses less digits than its factorization.

622172157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10915323.

The product of its digits is 11760, while the sum is 33.

The square root of 622172157 is about 24943.3790212954. The cubic root of 622172157 is about 853.6965453964.

The spelling of 622172157 in words is "six hundred twenty-two million, one hundred seventy-two thousand, one hundred fifty-seven".