51989558 has 16 divisors (see below), whose sum is σ = 80229744. Its totient is φ = 25251840.

The previous prime is 51989557. The next prime is 51989563. The reversal of 51989558 is 85598915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51989557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19841 + ... + 22307.

It is an arithmetic number, because the mean of its divisors is an integer number (5014359).

Almost surely, 2^51989558 is an apocalyptic number.

51989558 is a deficient number, since it is larger than the sum of its proper divisors (28240186).

51989558 is a wasteful number, since it uses less digits than its factorization.

51989558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its digits is 648000, while the sum is 50.

The square root of 51989558 is about 7210.3784921459. The cubic root of 51989558 is about 373.2261301108.

The spelling of 51989558 in words is "fifty-one million, nine hundred eighty-nine thousand, five hundred fifty-eight".