622543401 has 14 divisors (see below), whose sum is σ = 933389210. Its totient is φ = 415028448.

The previous prime is 622543393. The next prime is 622543447. The reversal of 622543401 is 104345226.

622543401 is a `hidden beast` number, since 6 + 2 + 254 + 3 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 617025600 + 5517801 = 24840^2 + 2349^2 .

It is not a de Polignac number, because 622543401 - 2³ = 622543393 is a prime.

It is a super-2 number, since 2×622543401² = 775120572257293602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622543501) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 426256 + ... + 427713.

Almost surely, 2^622543401 is an apocalyptic number.

It is an amenable number.

622543401 is a deficient number, since it is larger than the sum of its proper divisors (310845809).

622543401 is an frugal number, since it uses more digits than its factorization.

622543401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853987 (or 853972 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 622543401 is about 24950.8196458553. The cubic root of 622543401 is about 853.8663090764.

Adding to 622543401 its reverse (104345226), we get a palindrome (726888627).

The spelling of 622543401 in words is "six hundred twenty-two million, five hundred forty-three thousand, four hundred one".