55125321 has 4 divisors (see below), whose sum is σ = 73500432. Its totient is φ = 36750212.

The previous prime is 55125311. The next prime is 55125337. The reversal of 55125321 is 12352155.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 55125321 - 2¹¹ = 55123273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55125291 and 55125300.

It is not an unprimeable number, because it can be changed into a prime (55125311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9187551 + ... + 9187556.

It is an arithmetic number, because the mean of its divisors is an integer number (18375108).

Almost surely, 2^55125321 is an apocalyptic number.

It is an amenable number.

55125321 is a deficient number, since it is larger than the sum of its proper divisors (18375111).

55125321 is a wasteful number, since it uses less digits than its factorization.

55125321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18375110.

The product of its digits is 1500, while the sum is 24.

The square root of 55125321 is about 7424.6428196917. The cubic root of 55125321 is about 380.5838692778.

Adding to 55125321 its reverse (12352155), we get a palindrome (67477476).

The spelling of 55125321 in words is "fifty-five million, one hundred twenty-five thousand, three hundred twenty-one".