51677985 has 8 divisors (see below), whose sum is σ = 82684800. Its totient is φ = 27561584.

The previous prime is 51677947. The next prime is 51678013. The reversal of 51677985 is 58977615.

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 51677985 - 2⁶ = 51677921 is a prime.

It is a super-2 number, since 2×51677985² = 5341228267320450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1722585 + ... + 1722614.

It is an arithmetic number, because the mean of its divisors is an integer number (10335600).

Almost surely, 2^51677985 is an apocalyptic number.

It is an amenable number.

51677985 is a deficient number, since it is larger than the sum of its proper divisors (31006815).

51677985 is a wasteful number, since it uses less digits than its factorization.

51677985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445207.

The product of its digits is 529200, while the sum is 48.

The square root of 51677985 is about 7188.7401538795. The cubic root of 51677985 is about 372.4790553213.

The spelling of 51677985 in words is "fifty-one million, six hundred seventy-seven thousand, nine hundred eighty-five".