51651701 has 4 divisors (see below), whose sum is σ = 52305600. Its totient is φ = 50997804.

The previous prime is 51651683. The next prime is 51651713. The reversal of 51651701 is 10715615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51651701 - 2¹⁴ = 51635317 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 (51651751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326831 + ... + 326988.

It is an arithmetic number, because the mean of its divisors is an integer number (13076400).

Almost surely, 2^51651701 is an apocalyptic number.

It is an amenable number.

51651701 is a deficient number, since it is larger than the sum of its proper divisors (653899).

51651701 is an equidigital number, since it uses as much as digits as its factorization.

51651701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653898.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 51651701 is about 7186.9117846263. The cubic root of 51651701 is about 372.4158956105.

The spelling of 51651701 in words is "fifty-one million, six hundred fifty-one thousand, seven hundred one".