55042121525 has 12 divisors (see below), whose sum is σ = 68331712800. Its totient is φ = 43982418480.

The previous prime is 55042121509. The next prime is 55042121527. The reversal of 55042121525 is 52512124055.

It is a happy number.

It is not a de Polignac number, because 55042121525 - 2⁴ = 55042121509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55042121491 and 55042121500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55042121527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260065 + ... + 1303014.

It is an arithmetic number, because the mean of its divisors is an integer number (5694309400).

Almost surely, 2^55042121525 is an apocalyptic number.

It is an amenable number.

55042121525 is a deficient number, since it is larger than the sum of its proper divisors (13289591275).

55042121525 is a wasteful number, since it uses less digits than its factorization.

55042121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563948 (or 2563943 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 55042121525 in words is "fifty-five billion, forty-two million, one hundred twenty-one thousand, five hundred twenty-five".