55520513 has 2 divisors, whose sum is σ = 55520514. Its totient is φ = 55520512.

The previous prime is 55520501. The next prime is 55520537. The reversal of 55520513 is 31502555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51940849 + 3579664 = 7207^2 + 1892^2 .

It is a cyclic number.

It is not a de Polignac number, because 55520513 - 2¹⁰ = 55519489 is a prime.

It is not a weakly prime, because it can be changed into another prime (55520573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760256 + 27760257.

It is an arithmetic number, because the mean of its divisors is an integer number (27760257).

Almost surely, 2^55520513 is an apocalyptic number.

It is an amenable number.

55520513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55520513 is an equidigital number, since it uses as much as digits as its factorization.

55520513 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 55520513 is about 7451.2088281030. The cubic root of 55520513 is about 381.4911698854.

The spelling of 55520513 in words is "fifty-five million, five hundred twenty thousand, five hundred thirteen".