51887998 has 8 divisors (see below), whose sum is σ = 77960808. Its totient is φ = 25901064.

The previous prime is 51887987. The next prime is 51887999. The reversal of 51887998 is 89978815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19936 + ... + 22387.

It is an arithmetic number, because the mean of its divisors is an integer number (9745101).

Almost surely, 2^51887998 is an apocalyptic number.

51887998 is a deficient number, since it is larger than the sum of its proper divisors (26072810).

51887998 is a wasteful number, since it uses less digits than its factorization.

51887998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42938.

The product of its digits is 1451520, while the sum is 55.

The square root of 51887998 is about 7203.3324232608. The cubic root of 51887998 is about 372.9829431066.

The spelling of 51887998 in words is "fifty-one million, eight hundred eighty-seven thousand, nine hundred ninety-eight".