55143129 has 8 divisors (see below), whose sum is σ = 73611520. Its totient is φ = 36718416.

The previous prime is 55143119. The next prime is 55143131. The reversal of 55143129 is 92134155.

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

It is not a de Polignac number, because 55143129 - 2⁴ = 55143113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55143096 and 55143105.

It is not an unprimeable number, because it can be changed into a prime (55143119) 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, 7849 + ... + 13110.

It is an arithmetic number, because the mean of its divisors is an integer number (9201440).

Almost surely, 2^55143129 is an apocalyptic number.

It is an amenable number.

55143129 is a deficient number, since it is larger than the sum of its proper divisors (18468391).

55143129 is a wasteful number, since it uses less digits than its factorization.

55143129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839.

The product of its digits is 5400, while the sum is 30.

The square root of 55143129 is about 7425.8419724635. The cubic root of 55143129 is about 380.6248468646.

The spelling of 55143129 in words is "fifty-five million, one hundred forty-three thousand, one hundred twenty-nine".