55012511 has 2 divisors, whose sum is σ = 55012512. Its totient is φ = 55012510.

The previous prime is 55012453. The next prime is 55012537. The reversal of 55012511 is 11521055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55012511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55012541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27506255 + 27506256.

It is an arithmetic number, because the mean of its divisors is an integer number (27506256).

Almost surely, 2^55012511 is an apocalyptic number.

55012511 is a deficient number, since it is larger than the sum of its proper divisors (1).

55012511 is an equidigital number, since it uses as much as digits as its factorization.

55012511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 55012511 is about 7417.0419305812. The cubic root of 55012511 is about 380.3240794889.

Adding to 55012511 its reverse (11521055), we get a palindrome (66533566).

The spelling of 55012511 in words is "fifty-five million, twelve thousand, five hundred eleven".