51723129 has 16 divisors (see below), whose sum is σ = 74115648. Its totient is φ = 31967232.

The previous prime is 51723127. The next prime is 51723137. The reversal of 51723129 is 92132715.

It is not a de Polignac number, because 51723129 - 2¹ = 51723127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51723096 and 51723105.

It is not an unprimeable number, because it can be changed into a prime (51723127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4152 + ... + 10985.

It is an arithmetic number, because the mean of its divisors is an integer number (4632228).

Almost surely, 2^51723129 is an apocalyptic number.

It is an amenable number.

51723129 is a deficient number, since it is larger than the sum of its proper divisors (22392519).

51723129 is a wasteful number, since it uses less digits than its factorization.

51723129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15224.

The product of its digits is 3780, while the sum is 30.

The square root of 51723129 is about 7191.8793788550. The cubic root of 51723129 is about 372.5874851196.

The spelling of 51723129 in words is "fifty-one million, seven hundred twenty-three thousand, one hundred twenty-nine".