51998310 has 144 divisors (see below), whose sum is σ = 169552656. Its totient is φ = 10958976.

The previous prime is 51998299. The next prime is 51998311. The reversal of 51998310 is 1389915.

It is a happy number.

It is a super-2 number, since 2×51998310² = 5407648485712200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51998311) 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, 56877 + ... + 57783.

It is an arithmetic number, because the mean of its divisors is an integer number (1177449).

Almost surely, 2^51998310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51998310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84776328).

51998310 is an abundant number, since it is smaller than the sum of its proper divisors (117554346).

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

51998310 is a wasteful number, since it uses less digits than its factorization.

51998310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 51998310 is about 7210.9853695594. The cubic root of 51998310 is about 373.2470720842.

The spelling of 51998310 in words is "fifty-one million, nine hundred ninety-eight thousand, three hundred ten".