55129049 has 4 divisors (see below), whose sum is σ = 55563264. Its totient is φ = 54694836.

The previous prime is 55129033. The next prime is 55129057. The reversal of 55129049 is 94092155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94092155 = 5 ⋅18818431.

It is not a de Polignac number, because 55129049 - 2⁴ = 55129033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55123049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216917 + ... + 217170.

It is an arithmetic number, because the mean of its divisors is an integer number (13890816).

Almost surely, 2^55129049 is an apocalyptic number.

It is an amenable number.

55129049 is a deficient number, since it is larger than the sum of its proper divisors (434215).

55129049 is a wasteful number, since it uses less digits than its factorization.

55129049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434214.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 55129049 is about 7424.8938712954. The cubic root of 55129049 is about 380.5924484247.

The spelling of 55129049 in words is "fifty-five million, one hundred twenty-nine thousand, forty-nine".