2157534288 has 360 divisors, whose sum is σ = 7754274528. Its totient is φ = 554770944.

The previous prime is 2157534259. The next prime is 2157534307. The reversal of 2157534288 is 8824357512.

2157534288 is a `hidden beast` number, since 21 + 575 + 34 + 28 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3944031 + ... + 3944577.

Almost surely, 2^2157534288 is an apocalyptic number.

2157534288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157534288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3877137264).

2157534288 is an abundant number, since it is smaller than the sum of its proper divisors (5596740240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157534288 is a wasteful number, since it uses less digits than its factorization.

2157534288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 615 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 2157534288 is about 46449.2657423129. The cubic root of 2157534288 is about 1292.1687549350.

The spelling of 2157534288 in words is "two billion, one hundred fifty-seven million, five hundred thirty-four thousand, two hundred eighty-eight".