2151634212 has 384 divisors, whose sum is σ = 7240647680. Its totient is φ = 537477120.

The previous prime is 2151634211. The next prime is 2151634241. The reversal of 2151634212 is 2124361512.

2151634212 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 634 + 21 + 2 = 666.

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

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (2151634211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22181748 + ... + 22181844.

Almost surely, 2^2151634212 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 2151634212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3620323840).

2151634212 is an abundant number, since it is smaller than the sum of its proper divisors (5089013468).

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

2151634212 is a wasteful number, since it uses less digits than its factorization.

2151634212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 220 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2151634212 is about 46385.7112913018. The cubic root of 2151634212 is about 1290.9898082072.

Adding to 2151634212 its reverse (2124361512), we get a palindrome (4275995724).

The spelling of 2151634212 in words is "two billion, one hundred fifty-one million, six hundred thirty-four thousand, two hundred twelve".