2157674443 has 4 divisors (see below), whose sum is σ = 2232077040. Its totient is φ = 2083271848.

The previous prime is 2157674423. The next prime is 2157674461. The reversal of 2157674443 is 3444767512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157674443 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 2157674443.

It is not an unprimeable number, because it can be changed into a prime (2157674423) 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, 37201255 + ... + 37201312.

It is an arithmetic number, because the mean of its divisors is an integer number (558019260).

Almost surely, 2^2157674443 is an apocalyptic number.

2157674443 is a deficient number, since it is larger than the sum of its proper divisors (74402597).

2157674443 is an equidigital number, since it uses as much as digits as its factorization.

2157674443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74402596.

The product of its digits is 564480, while the sum is 43.

The square root of 2157674443 is about 46450.7744068923. The cubic root of 2157674443 is about 1292.1967344039.

The spelling of 2157674443 in words is "two billion, one hundred fifty-seven million, six hundred seventy-four thousand, four hundred forty-three".