51012641 has 4 divisors (see below), whose sum is σ = 51028272. Its totient is φ = 50997012.

The previous prime is 51012629. The next prime is 51012649. The reversal of 51012641 is 14621015.

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 51012641 - 2¹⁰ = 51011617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51012649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (12757068).

Almost surely, 2^51012641 is an apocalyptic number.

It is an amenable number.

51012641 is a deficient number, since it is larger than the sum of its proper divisors (15631).

51012641 is a wasteful number, since it uses less digits than its factorization.

51012641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15630.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51012641 is about 7142.3134207342. The cubic root of 51012641 is about 370.8736137816.

Adding to 51012641 its reverse (14621015), we get a palindrome (65633656).

The spelling of 51012641 in words is "fifty-one million, twelve thousand, six hundred forty-one".