2143557 has 32 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 1270080.

The previous prime is 2143543. The next prime is 2143567. The reversal of 2143557 is 7553412.

It is a happy number.

It is not a de Polignac number, because 2143557 - 2⁴ = 2143541 is a prime.

It is a super-2 number, since 2×2143557² = 9189673224498, which contains 22 as substring.

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

It is a d-powerful number, because it can be written as 2¹⁷ + 1 + 4⁴ + 3¹⁰ + 5 + 5⁹ + 7² .

It is a self number, because there is not a number n which added to its sum of digits gives 2143557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10783 + ... + 10979.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^2143557 is an apocalyptic number.

2143557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2143557 is a deficient number, since it is larger than the sum of its proper divisors (1404603).

2143557 is a wasteful number, since it uses less digits than its factorization.

2143557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 244 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 2143557 is about 1464.0891366307. The cubic root of 2143557 is about 128.9372328501.

Adding to 2143557 its reverse (7553412), we get a palindrome (9696969).

The spelling of 2143557 in words is "two million, one hundred forty-three thousand, five hundred fifty-seven".