2147557 has 4 divisors (see below), whose sum is σ = 2150496. Its totient is φ = 2144620.

The previous prime is 2147527. The next prime is 2147569. The reversal of 2147557 is 7557412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2147557 - 2⁷ = 2147429 is a prime.

It is a super-2 number, since 2×2147557² = 9224002136498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (537624).

2^2147557 is an apocalyptic number.

It is an amenable number.

2147557 is a deficient number, since it is larger than the sum of its proper divisors (2939).

2147557 is a wasteful number, since it uses less digits than its factorization.

2147557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938.

The product of its digits is 9800, while the sum is 31.

The square root of 2147557 is about 1465.4545369953. The cubic root of 2147557 is about 129.0173844328.

It can be divided in two parts, 2147 and 557, that added together give a square (2704 = 52²).

The spelling of 2147557 in words is "two million, one hundred forty-seven thousand, five hundred fifty-seven".