2187229536 has 144 divisors (see below), whose sum is σ = 6583777200. Its totient is φ = 686859264.

The previous prime is 2187229519. The next prime is 2187229547. The reversal of 2187229536 is 6359227812.

2187229536 is a `hidden beast` number, since 21 + 8 + 72 + 29 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2187229491 and 2187229500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1076970 + ... + 1078998.

It is an arithmetic number, because the mean of its divisors is an integer number (45720675).

Almost surely, 2^2187229536 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 2187229536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291888600).

2187229536 is an abundant number, since it is smaller than the sum of its proper divisors (4396547664).

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

2187229536 is a wasteful number, since it uses less digits than its factorization.

2187229536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2250 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 2187229536 is about 46767.8258635143. The cubic root of 2187229536 is about 1298.0700229634.

The spelling of 2187229536 in words is "two billion, one hundred eighty-seven million, two hundred twenty-nine thousand, five hundred thirty-six".