617221051 has 2 divisors, whose sum is σ = 617221052. Its totient is φ = 617221050.

The previous prime is 617221049. The next prime is 617221063. The reversal of 617221051 is 150122716.

617221051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 617221051 - 2¹ = 617221049 is a prime.

Together with 617221049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (617221081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308610525 + 308610526.

It is an arithmetic number, because the mean of its divisors is an integer number (308610526).

Almost surely, 2^617221051 is an apocalyptic number.

617221051 is a deficient number, since it is larger than the sum of its proper divisors (1).

617221051 is an equidigital number, since it uses as much as digits as its factorization.

617221051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 617221051 is about 24843.9338873698. The cubic root of 617221051 is about 851.4260035574.

Adding to 617221051 its reverse (150122716), we get a palindrome (767343767).

The spelling of 617221051 in words is "six hundred seventeen million, two hundred twenty-one thousand, fifty-one".