55250513 has 2 divisors, whose sum is σ = 55250514. Its totient is φ = 55250512.

The previous prime is 55250497. The next prime is 55250519. The reversal of 55250513 is 31505255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55249489 + 1024 = 7433^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 55250513 - 2⁴ = 55250497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55250519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625256 + 27625257.

It is an arithmetic number, because the mean of its divisors is an integer number (27625257).

Almost surely, 2^55250513 is an apocalyptic number.

It is an amenable number.

55250513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55250513 is an equidigital number, since it uses as much as digits as its factorization.

55250513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 55250513 is about 7433.0688816935. The cubic root of 55250513 is about 380.8717589541.

Adding to 55250513 its reverse (31505255), we get a palindrome (86755768).

The spelling of 55250513 in words is "fifty-five million, two hundred fifty thousand, five hundred thirteen".