51971554 has 8 divisors (see below), whose sum is σ = 77995728. Its totient is φ = 25972980.

The previous prime is 51971551. The next prime is 51971581. The reversal of 51971554 is 45517915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51971551) 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, 72 + ... + 10195.

It is an arithmetic number, because the mean of its divisors is an integer number (9749466).

Almost surely, 2^51971554 is an apocalyptic number.

51971554 is a deficient number, since it is larger than the sum of its proper divisors (26024174).

51971554 is a wasteful number, since it uses less digits than its factorization.

51971554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12800.

The product of its digits is 31500, while the sum is 37.

The square root of 51971554 is about 7209.1299058902. The cubic root of 51971554 is about 373.1830423619.

It can be divided in two parts, 51971 and 554, that added together give a palindrome (52525).

The spelling of 51971554 in words is "fifty-one million, nine hundred seventy-one thousand, five hundred fifty-four".