55121324 has 6 divisors (see below), whose sum is σ = 96462324. Its totient is φ = 27560660.

The previous prime is 55121273. The next prime is 55121359. The reversal of 55121324 is 42312155.

It is a self number, because there is not a number n which added to its sum of digits gives 55121324.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6890162 + ... + 6890169.

It is an arithmetic number, because the mean of its divisors is an integer number (16077054).

Almost surely, 2^55121324 is an apocalyptic number.

It is an amenable number.

55121324 is a deficient number, since it is larger than the sum of its proper divisors (41341000).

55121324 is a wasteful number, since it uses less digits than its factorization.

55121324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780335 (or 13780333 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 55121324 is about 7424.3736436147. The cubic root of 55121324 is about 380.5746706587.

Adding to 55121324 its reverse (42312155), we get a palindrome (97433479).

The spelling of 55121324 in words is "fifty-five million, one hundred twenty-one thousand, three hundred twenty-four".