51641533 has 4 divisors (see below), whose sum is σ = 51655968. Its totient is φ = 51627100.

The previous prime is 51641531. The next prime is 51641537. The reversal of 51641533 is 33514615.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33514615 = 5 ⋅6702923.

It is a cyclic number.

It is not a de Polignac number, because 51641533 - 2¹ = 51641531 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 (51641531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2610 + ... + 10492.

It is an arithmetic number, because the mean of its divisors is an integer number (12913992).

Almost surely, 2^51641533 is an apocalyptic number.

It is an amenable number.

51641533 is a deficient number, since it is larger than the sum of its proper divisors (14435).

51641533 is an equidigital number, since it uses as much as digits as its factorization.

51641533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14434.

The product of its digits is 5400, while the sum is 28.

The square root of 51641533 is about 7186.2043527860. The cubic root of 51641533 is about 372.3914564454.

The spelling of 51641533 in words is "fifty-one million, six hundred forty-one thousand, five hundred thirty-three".