51389102232 has 288 divisors, whose sum is σ = 157190997600. Its totient is φ = 15141095424.

The previous prime is 51389102231. The next prime is 51389102251. The reversal of 51389102232 is 23220198315.

51389102232 is a `hidden beast` number, since 51 + 389 + 1 + 0 + 223 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389102231) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48342933 + ... + 48343995.

It is an arithmetic number, because the mean of its divisors is an integer number (545802075).

Almost surely, 2^51389102232 is an apocalyptic number.

51389102232 is a gapful number since it is divisible by the number (52) 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 51389102232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78595498800).

51389102232 is an abundant number, since it is smaller than the sum of its proper divisors (105801895368).

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

51389102232 is a wasteful number, since it uses less digits than its factorization.

51389102232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 51389102232 in words is "fifty-one billion, three hundred eighty-nine million, one hundred two thousand, two hundred thirty-two".