51129485 has 8 divisors (see below), whose sum is σ = 66933216. Its totient is φ = 37185040.

The previous prime is 51129479. The next prime is 51129493. The reversal of 51129485 is 58492115.

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

It is not a de Polignac number, because 51129485 - 2⁸ = 51129229 is a prime.

It is a super-2 number, since 2×51129485² = 5228448472730450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 464759 + ... + 464868.

It is an arithmetic number, because the mean of its divisors is an integer number (8366652).

Almost surely, 2^51129485 is an apocalyptic number.

51129485 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51129485 is a deficient number, since it is larger than the sum of its proper divisors (15803731).

51129485 is a wasteful number, since it uses less digits than its factorization.

51129485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929643.

The product of its digits is 14400, while the sum is 35.

The square root of 51129485 is about 7150.4884448547. The cubic root of 51129485 is about 371.1565587672.

The spelling of 51129485 in words is "fifty-one million, one hundred twenty-nine thousand, four hundred eighty-five".