51065641 has 8 divisors (see below), whose sum is σ = 56893824. Its totient is φ = 45435120.

The previous prime is 51065629. The next prime is 51065653. The reversal of 51065641 is 14656015.

It is an interprime number because it is at equal distance from previous prime (51065629) and next prime (51065653).

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 51065641 - 2¹⁹ = 50541353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51065611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48870 + ... + 49903.

It is an arithmetic number, because the mean of its divisors is an integer number (7111728).

Almost surely, 2^51065641 is an apocalyptic number.

It is an amenable number.

51065641 is a deficient number, since it is larger than the sum of its proper divisors (5828183).

51065641 is a wasteful number, since it uses less digits than its factorization.

51065641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98831.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51065641 is about 7146.0227399582. The cubic root of 51065641 is about 371.0020100491.

The spelling of 51065641 in words is "fifty-one million, sixty-five thousand, six hundred forty-one".