55202561 has 4 divisors (see below), whose sum is σ = 55278000. Its totient is φ = 55127124.

The previous prime is 55202549. The next prime is 55202569. The reversal of 55202561 is 16520255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55202561 - 2²² = 51008257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55202561.

It is not an unprimeable number, because it can be changed into a prime (55202569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36611 + ... + 38088.

It is an arithmetic number, because the mean of its divisors is an integer number (13819500).

Almost surely, 2^55202561 is an apocalyptic number.

It is an amenable number.

55202561 is a deficient number, since it is larger than the sum of its proper divisors (75439).

55202561 is an equidigital number, since it uses as much as digits as its factorization.

55202561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75438.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55202561 is about 7429.8425959101. The cubic root of 55202561 is about 380.7615406786.

The spelling of 55202561 in words is "fifty-five million, two hundred two thousand, five hundred sixty-one".