51533457 has 4 divisors (see below), whose sum is σ = 68711280. Its totient is φ = 34355636.

The previous prime is 51533441. The next prime is 51533459. The reversal of 51533457 is 75433515.

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 51533457 - 2⁴ = 51533441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51533459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8588907 + ... + 8588912.

It is an arithmetic number, because the mean of its divisors is an integer number (17177820).

Almost surely, 2^51533457 is an apocalyptic number.

It is an amenable number.

51533457 is a deficient number, since it is larger than the sum of its proper divisors (17177823).

51533457 is a wasteful number, since it uses less digits than its factorization.

51533457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17177822.

The product of its digits is 31500, while the sum is 33.

The square root of 51533457 is about 7178.6807283790. The cubic root of 51533457 is about 372.1314932881.

The spelling of 51533457 in words is "fifty-one million, five hundred thirty-three thousand, four hundred fifty-seven".