51232687 has 8 divisors (see below), whose sum is σ = 55942992. Its totient is φ = 46531200.

The previous prime is 51232681. The next prime is 51232691. The reversal of 51232687 is 78623215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51232687 - 2²³ = 42844079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51232681) 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, 18237 + ... + 20857.

It is an arithmetic number, because the mean of its divisors is an integer number (6992874).

Almost surely, 2^51232687 is an apocalyptic number.

51232687 is a deficient number, since it is larger than the sum of its proper divisors (4710305).

51232687 is a wasteful number, since it uses less digits than its factorization.

51232687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409.

The product of its digits is 20160, while the sum is 34.

The square root of 51232687 is about 7157.7012371291. The cubic root of 51232687 is about 371.4061105113.

The spelling of 51232687 in words is "fifty-one million, two hundred thirty-two thousand, six hundred eighty-seven".