55805501 has 2 divisors, whose sum is σ = 55805502. Its totient is φ = 55805500.

The previous prime is 55805479. The next prime is 55805513. The reversal of 55805501 is 10550855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46594276 + 9211225 = 6826^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 55805501 - 2¹⁰ = 55804477 is a prime.

It is a super-2 number, since 2×55805501² = 6228507883722002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55805531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27902750 + 27902751.

It is an arithmetic number, because the mean of its divisors is an integer number (27902751).

Almost surely, 2^55805501 is an apocalyptic number.

It is an amenable number.

55805501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55805501 is an equidigital number, since it uses as much as digits as its factorization.

55805501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 55805501 is about 7470.3079588461. The cubic root of 55805501 is about 382.1427903822.

The spelling of 55805501 in words is "fifty-five million, eight hundred five thousand, five hundred one".