51285641 has 4 divisors (see below), whose sum is σ = 55947984. Its totient is φ = 46623300.

The previous prime is 51285631. The next prime is 51285673. The reversal of 51285641 is 14658215.

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 51285641 - 2²² = 47091337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51285598 and 51285607.

It is not an unprimeable number, because it can be changed into a prime (51285631) 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, 2331155 + ... + 2331176.

It is an arithmetic number, because the mean of its divisors is an integer number (13986996).

Almost surely, 2^51285641 is an apocalyptic number.

It is an amenable number.

51285641 is a deficient number, since it is larger than the sum of its proper divisors (4662343).

51285641 is a wasteful number, since it uses less digits than its factorization.

51285641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662342.

The product of its digits is 9600, while the sum is 32.

The square root of 51285641 is about 7161.3993744240. The cubic root of 51285641 is about 371.5340279806.

The spelling of 51285641 in words is "fifty-one million, two hundred eighty-five thousand, six hundred forty-one".