2116557 has 16 divisors (see below), whose sum is σ = 3158080. Its totient is φ = 1400976.

The previous prime is 2116537. The next prime is 2116559. The reversal of 2116557 is 7556112.

2116557 is a `hidden beast` number, since 2 + 1 + 1 + 655 + 7 = 666.

It is not a de Polignac number, because 2116557 - 2¹¹ = 2114509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 2116557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7338 + ... + 7620.

It is an arithmetic number, because the mean of its divisors is an integer number (197380).

2^2116557 is an apocalyptic number.

2116557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2116557 is a deficient number, since it is larger than the sum of its proper divisors (1041523).

2116557 is a wasteful number, since it uses less digits than its factorization.

2116557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 563 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2116557 is about 1454.8391663686. The cubic root of 2116557 is about 128.3935842720.

The spelling of 2116557 in words is "two million, one hundred sixteen thousand, five hundred fifty-seven".