55374521 has 2 divisors, whose sum is σ = 55374522. Its totient is φ = 55374520.

The previous prime is 55374503. The next prime is 55374581. The reversal of 55374521 is 12547355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49561600 + 5812921 = 7040^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 55374521 - 2¹⁸ = 55112377 is a prime.

It is not a weakly prime, because it can be changed into another prime (55374581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27687260 + 27687261.

It is an arithmetic number, because the mean of its divisors is an integer number (27687261).

Almost surely, 2^55374521 is an apocalyptic number.

It is an amenable number.

55374521 is a deficient number, since it is larger than the sum of its proper divisors (1).

55374521 is an equidigital number, since it uses as much as digits as its factorization.

55374521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 55374521 is about 7441.4058483596. The cubic root of 55374521 is about 381.1564975037.

The spelling of 55374521 in words is "fifty-five million, three hundred seventy-four thousand, five hundred twenty-one".