2051569957 has 8 divisors (see below), whose sum is σ = 2072480256. Its totient is φ = 2030692032.

The previous prime is 2051569937. The next prime is 2051569963. The reversal of 2051569957 is 7599651502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2051569957 - 2⁷ = 2051569829 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 2051569957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051569907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131388 + ... + 146170.

It is an arithmetic number, because the mean of its divisors is an integer number (259060032).

Almost surely, 2^2051569957 is an apocalyptic number.

It is an amenable number.

2051569957 is a deficient number, since it is larger than the sum of its proper divisors (20910299).

2051569957 is a wasteful number, since it uses less digits than its factorization.

2051569957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16187.

The product of its (nonzero) digits is 850500, while the sum is 49.

The square root of 2051569957 is about 45294.2596473328. The cubic root of 2051569957 is about 1270.6582978131.

The spelling of 2051569957 in words is "two billion, fifty-one million, five hundred sixty-nine thousand, nine hundred fifty-seven".