55101509 has 2 divisors, whose sum is σ = 55101510. Its totient is φ = 55101508.

The previous prime is 55101451. The next prime is 55101521. The reversal of 55101509 is 90510155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38316100 + 16785409 = 6190^2 + 4097^2 .

It is a cyclic number.

It is not a de Polignac number, because 55101509 - 2¹⁶ = 55035973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55101559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550754 + 27550755.

It is an arithmetic number, because the mean of its divisors is an integer number (27550755).

Almost surely, 2^55101509 is an apocalyptic number.

It is an amenable number.

55101509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55101509 is an equidigital number, since it uses as much as digits as its factorization.

55101509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 55101509 is about 7423.0390676596. The cubic root of 55101509 is about 380.5290622302.

The spelling of 55101509 in words is "fifty-five million, one hundred one thousand, five hundred nine".