2151712512 has 108 divisors (see below), whose sum is σ = 6433878360. Its totient is φ = 717216768.

The previous prime is 2151712489. The next prime is 2151712517. The reversal of 2151712512 is 2152171512.

2151712512 is a `hidden beast` number, since 21 + 517 + 125 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151712517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44914 + ... + 79502.

Almost surely, 2^2151712512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151712512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3216939180).

2151712512 is an abundant number, since it is smaller than the sum of its proper divisors (4282165848).

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

2151712512 is an frugal number, since it uses more digits than its factorization.

2151712512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34620 (or 34594 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 2151712512 is about 46386.5552935331. Note that the first 3 decimals coincide. The cubic root of 2151712512 is about 1291.0054681298.

The spelling of 2151712512 in words is "two billion, one hundred fifty-one million, seven hundred twelve thousand, five hundred twelve".