2057622391 has 4 divisors (see below), whose sum is σ = 2244678984. Its totient is φ = 1870565800.

The previous prime is 2057622379. The next prime is 2057622401. The reversal of 2057622391 is 1932267502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2057622391 - 2⁷ = 2057622263 is a prime.

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 2057622391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057622361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93528280 + ... + 93528301.

It is an arithmetic number, because the mean of its divisors is an integer number (561169746).

Almost surely, 2^2057622391 is an apocalyptic number.

2057622391 is a deficient number, since it is larger than the sum of its proper divisors (187056593).

2057622391 is a wasteful number, since it uses less digits than its factorization.

2057622391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187056592.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 2057622391 is about 45361.0228169516. The cubic root of 2057622391 is about 1271.9066141820.

Adding to 2057622391 its reverse (1932267502), we get a palindrome (3989889893).

The spelling of 2057622391 in words is "two billion, fifty-seven million, six hundred twenty-two thousand, three hundred ninety-one".