2143621474 has 4 divisors (see below), whose sum is σ = 3215432214. Its totient is φ = 1071810736.

The previous prime is 2143621427. The next prime is 2143621483. The reversal of 2143621474 is 4741263412.

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

It can be written as a sum of positive squares in only one way, i.e., 2133793249 + 9828225 = 46193^2 + 3135^2 .

It is a super-2 number, since 2×2143621474² = 9190226047587865352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535905367 + ... + 535905370.

Almost surely, 2^2143621474 is an apocalyptic number.

2143621474 is a deficient number, since it is larger than the sum of its proper divisors (1071810740).

2143621474 is a wasteful number, since it uses less digits than its factorization.

2143621474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071810739.

The product of its digits is 32256, while the sum is 34.

The square root of 2143621474 is about 46299.2599724877. The cubic root of 2143621474 is about 1289.3852556373.

Adding to 2143621474 its reverse (4741263412), we get a palindrome (6884884886).

The spelling of 2143621474 in words is "two billion, one hundred forty-three million, six hundred twenty-one thousand, four hundred seventy-four".