55240313 has 2 divisors, whose sum is σ = 55240314. Its totient is φ = 55240312.

The previous prime is 55240303. The next prime is 55240321. The reversal of 55240313 is 31304255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44462224 + 10778089 = 6668^2 + 3283^2 .

It is a cyclic number.

It is not a de Polignac number, because 55240313 - 2⁸ = 55240057 is a prime.

It is not a weakly prime, because it can be changed into another prime (55240303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620156 + 27620157.

It is an arithmetic number, because the mean of its divisors is an integer number (27620157).

Almost surely, 2^55240313 is an apocalyptic number.

It is an amenable number.

55240313 is a deficient number, since it is larger than the sum of its proper divisors (1).

55240313 is an equidigital number, since it uses as much as digits as its factorization.

55240313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55240313 is about 7432.3827269591. The cubic root of 55240313 is about 380.8483194671.

Adding to 55240313 its reverse (31304255), we get a palindrome (86544568).

The spelling of 55240313 in words is "fifty-five million, two hundred forty thousand, three hundred thirteen".