2157755284 has 12 divisors (see below), whose sum is σ = 3778727904. Its totient is φ = 1078118744.

The previous prime is 2157755267. The next prime is 2157755293. The reversal of 2157755284 is 4825577512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183304 + ... + 194719.

It is an arithmetic number, because the mean of its divisors is an integer number (314893992).

Almost surely, 2^2157755284 is an apocalyptic number.

It is an amenable number.

2157755284 is a deficient number, since it is larger than the sum of its proper divisors (1620972620).

2157755284 is a wasteful number, since it uses less digits than its factorization.

2157755284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379454 (or 379452 counting only the distinct ones).

The product of its digits is 784000, while the sum is 46.

The square root of 2157755284 is about 46451.6445779910. The cubic root of 2157755284 is about 1292.2128723299.

The spelling of 2157755284 in words is "two billion, one hundred fifty-seven million, seven hundred fifty-five thousand, two hundred eighty-four".