616522001 has 2 divisors, whose sum is σ = 616522002. Its totient is φ = 616522000.

The previous prime is 616521989. The next prime is 616522031. The reversal of 616522001 is 100225616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421891600 + 194630401 = 20540^2 + 13951^2 .

It is a cyclic number.

It is not a de Polignac number, because 616522001 - 2¹⁸ = 616259857 is a prime.

It is not a weakly prime, because it can be changed into another prime (616522031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308261000 + 308261001.

It is an arithmetic number, because the mean of its divisors is an integer number (308261001).

Almost surely, 2^616522001 is an apocalyptic number.

It is an amenable number.

616522001 is a deficient number, since it is larger than the sum of its proper divisors (1).

616522001 is an equidigital number, since it uses as much as digits as its factorization.

616522001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 616522001 is about 24829.8610749235. The cubic root of 616522001 is about 851.1044471299.

Adding to 616522001 its reverse (100225616), we get a palindrome (716747617).

The spelling of 616522001 in words is "six hundred sixteen million, five hundred twenty-two thousand, one".