51994488 has 192 divisors, whose sum is σ = 172368000. Its totient is φ = 12918528.

The previous prime is 51994487. The next prime is 51994489. The reversal of 51994488 is 88449915.

It is an interprime number because it is at equal distance from previous prime (51994487) and next prime (51994489).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51994487) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290383 + ... + 290561.

It is an arithmetic number, because the mean of its divisors is an integer number (897750).

Almost surely, 2^51994488 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 51994488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86184000).

51994488 is an abundant number, since it is smaller than the sum of its proper divisors (120373512).

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

51994488 is a wasteful number, since it uses less digits than its factorization.

51994488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 223 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 51994488 is about 7210.7203523642. The cubic root of 51994488 is about 373.2379270096.

The spelling of 51994488 in words is "fifty-one million, nine hundred ninety-four thousand, four hundred eighty-eight".