51091629 has 8 divisors (see below), whose sum is σ = 69407712. Its totient is φ = 33418320.

The previous prime is 51091609. The next prime is 51091631. The reversal of 51091629 is 92619015.

51091629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51091629 - 2¹⁷ = 50960557 is a prime.

It is a super-2 number, since 2×51091629² = 5220709107747282, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51091629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51091609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160507 + ... + 160824.

It is an arithmetic number, because the mean of its divisors is an integer number (8675964).

Almost surely, 2^51091629 is an apocalyptic number.

It is an amenable number.

51091629 is a deficient number, since it is larger than the sum of its proper divisors (18316083).

51091629 is a wasteful number, since it uses less digits than its factorization.

51091629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321387.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 51091629 is about 7147.8408628061. The cubic root of 51091629 is about 371.0649353672.

The spelling of 51091629 in words is "fifty-one million, ninety-one thousand, six hundred twenty-nine".