2155987714 has 4 divisors (see below), whose sum is σ = 3233981574. Its totient is φ = 1077993856.

The previous prime is 2155987699. The next prime is 2155987723. The reversal of 2155987714 is 4177895512.

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., 1754185689 + 401802025 = 41883^2 + 20045^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538996927 + ... + 538996930.

Almost surely, 2^2155987714 is an apocalyptic number.

2155987714 is a deficient number, since it is larger than the sum of its proper divisors (1077993860).

2155987714 is a wasteful number, since it uses less digits than its factorization.

2155987714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077993859.

The product of its digits is 705600, while the sum is 49.

The square root of 2155987714 is about 46432.6147659164. The cubic root of 2155987714 is about 1291.8599282788.

The spelling of 2155987714 in words is "two billion, one hundred fifty-five million, nine hundred eighty-seven thousand, seven hundred fourteen".