51787012 has 12 divisors (see below), whose sum is σ = 90706896. Its totient is φ = 25870760.

The previous prime is 51786991. The next prime is 51787033. The reversal of 51787012 is 21078715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51786991) and next prime (51787033).

It is a super-2 number, since 2×51787012² = 5363789223776288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87 + ... + 10177.

It is an arithmetic number, because the mean of its divisors is an integer number (7558908).

Almost surely, 2^51787012 is an apocalyptic number.

It is an amenable number.

51787012 is a deficient number, since it is larger than the sum of its proper divisors (38919884).

51787012 is a wasteful number, since it uses less digits than its factorization.

51787012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11378 (or 11376 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 51787012 is about 7196.3193369944. The cubic root of 51787012 is about 372.7408157104.

The spelling of 51787012 in words is "fifty-one million, seven hundred eighty-seven thousand, twelve".