51123129 has 8 divisors (see below), whose sum is σ = 71751840. Its totient is φ = 32288256.

The previous prime is 51123119. The next prime is 51123151. The reversal of 51123129 is 92132115.

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

It is not a de Polignac number, because 51123129 - 2⁸ = 51122873 is a prime.

It is a super-2 number, since 2×51123129² = 5227148637501282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51123099 and 51123108.

It is not an unprimeable number, because it can be changed into a prime (51123109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448392 + ... + 448505.

It is an arithmetic number, because the mean of its divisors is an integer number (8968980).

Almost surely, 2^51123129 is an apocalyptic number.

It is an amenable number.

51123129 is a deficient number, since it is larger than the sum of its proper divisors (20628711).

51123129 is a wasteful number, since it uses less digits than its factorization.

51123129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896919.

The product of its digits is 540, while the sum is 24.

The square root of 51123129 is about 7150.0439858787. The cubic root of 51123129 is about 371.1411784124.

The spelling of 51123129 in words is "fifty-one million, one hundred twenty-three thousand, one hundred twenty-nine".