51621054 has 8 divisors (see below), whose sum is σ = 103242120. Its totient is φ = 17207016.

The previous prime is 51621041. The next prime is 51621071. The reversal of 51621054 is 45012615.

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

51621054 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4301749 + ... + 4301760.

It is an arithmetic number, because the mean of its divisors is an integer number (12905265).

Almost surely, 2^51621054 is an apocalyptic number.

51621054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51621054 is a wasteful number, since it uses less digits than its factorization.

51621054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8603514.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51621054 is about 7184.7793285528. The cubic root of 51621054 is about 372.3422246708.

Adding to 51621054 its reverse (45012615), we get a palindrome (96633669).

It can be divided in two parts, 5162 and 1054, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 51621054 in words is "fifty-one million, six hundred twenty-one thousand, fifty-four".