5121211392 has 264 divisors, whose sum is σ = 16738106112. Its totient is φ = 1551052800.

The previous prime is 5121211367. The next prime is 5121211399. The reversal of 5121211392 is 2931121215.

5121211392 is a `hidden beast` number, since 51 + 212 + 11 + 392 = 666.

It is a tau number, because it is divible by the number of its divisors (264).

It is a super-2 number, since 2×5121211392² = 52453612243101155328, which contains 22 as substring.

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 (5121211399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2736217 + ... + 2738087.

Almost surely, 2^5121211392 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 5121211392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8369053056).

5121211392 is an abundant number, since it is smaller than the sum of its proper divisors (11616894720).

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

5121211392 is a wasteful number, since it uses less digits than its factorization.

5121211392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1887 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 5121211392 is about 71562.6396382917. The cubic root of 5121211392 is about 1723.6836717726.

The spelling of 5121211392 in words is "five billion, one hundred twenty-one million, two hundred eleven thousand, three hundred ninety-two".