622137601 has 4 divisors (see below), whose sum is σ = 622195204. Its totient is φ = 622080000.

The previous prime is 622137589. The next prime is 622137617. The reversal of 622137601 is 106731226.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 567392400 + 54745201 = 23820^2 + 7399^2 .

It is a 3-Lehmer number, since φ(622137601) divides (622137601-1)³.

It is a cyclic number.

It is not a de Polignac number, because 622137601 - 2⁷ = 622137473 is a prime.

It is a deceptive number, since it divides R_622137600.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 622137601.

It is not an unprimeable number, because it can be changed into a prime (622137101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7200 + ... + 36001.

It is an arithmetic number, because the mean of its divisors is an integer number (155548801).

It is a Poulet number, since it divides 2^622137600-1.

Almost surely, 2^622137601 is an apocalyptic number.

622137601 is the 14401-st octagonal number.

It is an amenable number.

622137601 is a deficient number, since it is larger than the sum of its proper divisors (57603).

622137601 is a wasteful number, since it uses less digits than its factorization.

622137601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57602.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 622137601 is about 24942.6863228482. The cubic root of 622137601 is about 853.6807400797.

Adding to 622137601 its reverse (106731226), we get a palindrome (728868827).

The spelling of 622137601 in words is "six hundred twenty-two million, one hundred thirty-seven thousand, six hundred one".