51645941 has 4 divisors (see below), whose sum is σ = 51667584. Its totient is φ = 51624300.

The previous prime is 51645931. The next prime is 51645943. The reversal of 51645941 is 14954615.

51645941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51645941 - 2⁶ = 51645877 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 (51645943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6725 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (12916896).

Almost surely, 2^51645941 is an apocalyptic number.

It is an amenable number.

51645941 is a deficient number, since it is larger than the sum of its proper divisors (21643).

51645941 is a wasteful number, since it uses less digits than its factorization.

51645941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21642.

The product of its digits is 21600, while the sum is 35.

The square root of 51645941 is about 7186.5110450065. The cubic root of 51645941 is about 372.4020516308.

The spelling of 51645941 in words is "fifty-one million, six hundred forty-five thousand, nine hundred forty-one".