51246665 has 16 divisors (see below), whose sum is σ = 63402240. Its totient is φ = 39735360.

The previous prime is 51246661. The next prime is 51246673. The reversal of 51246665 is 56664215.

It is not a de Polignac number, because 51246665 - 2² = 51246661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51246661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80900 + ... + 81530.

It is an arithmetic number, because the mean of its divisors is an integer number (3962640).

Almost surely, 2^51246665 is an apocalyptic number.

It is an amenable number.

51246665 is a deficient number, since it is larger than the sum of its proper divisors (12155575).

51246665 is a wasteful number, since it uses less digits than its factorization.

51246665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its digits is 43200, while the sum is 35.

The square root of 51246665 is about 7158.6776013451. The cubic root of 51246665 is about 371.4398847991.

The spelling of 51246665 in words is "fifty-one million, two hundred forty-six thousand, six hundred sixty-five".