51626566 has 4 divisors (see below), whose sum is σ = 77439852. Its totient is φ = 25813282.

The previous prime is 51626551. The next prime is 51626567. The reversal of 51626566 is 66562615.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51626567) 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 as a sum of consecutive naturals, namely, 12906640 + ... + 12906643.

It is an arithmetic number, because the mean of its divisors is an integer number (19359963).

Almost surely, 2^51626566 is an apocalyptic number.

51626566 is a deficient number, since it is larger than the sum of its proper divisors (25813286).

51626566 is a wasteful number, since it uses less digits than its factorization.

51626566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25813285.

The product of its digits is 64800, while the sum is 37.

The square root of 51626566 is about 7185.1629069910. The cubic root of 51626566 is about 372.3554768689.

The spelling of 51626566 in words is "fifty-one million, six hundred twenty-six thousand, five hundred sixty-six".