51116487 has 8 divisors (see below), whose sum is σ = 68389104. Its totient is φ = 33960768.

The previous prime is 51116477. The next prime is 51116503. The reversal of 51116487 is 78461115.

It is a happy number.

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

It is not a de Polignac number, because 51116487 - 2¹¹ = 51114439 is a prime.

It is a super-2 number, since 2×51116487² = 5225790486442338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51116407) 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, 28198 + ... + 29955.

It is an arithmetic number, because the mean of its divisors is an integer number (8548638).

Almost surely, 2^51116487 is an apocalyptic number.

51116487 is a deficient number, since it is larger than the sum of its proper divisors (17272617).

51116487 is a wasteful number, since it uses less digits than its factorization.

51116487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58449.

The product of its digits is 6720, while the sum is 33.

The square root of 51116487 is about 7149.5794981243. The cubic root of 51116487 is about 371.1251046280.

The spelling of 51116487 in words is "fifty-one million, one hundred sixteen thousand, four hundred eighty-seven".