51641699 has 6 divisors (see below), whose sum is σ = 54858444. Its totient is φ = 48603680.

The previous prime is 51641683. The next prime is 51641713. The reversal of 51641699 is 99614615.

It is not a de Polignac number, because 51641699 - 2⁴ = 51641683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51641659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89057 + ... + 89634.

It is an arithmetic number, because the mean of its divisors is an integer number (9143074).

Almost surely, 2^51641699 is an apocalyptic number.

51641699 is a deficient number, since it is larger than the sum of its proper divisors (3216745).

51641699 is a wasteful number, since it uses less digits than its factorization.

51641699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178725 (or 178708 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 51641699 is about 7186.2159026848. The cubic root of 51641699 is about 372.3918554584.

The spelling of 51641699 in words is "fifty-one million, six hundred forty-one thousand, six hundred ninety-nine".