55730205251 has 4 divisors (see below), whose sum is σ = 63691663152. Its totient is φ = 47768747352.

The previous prime is 55730205247. The next prime is 55730205253. The reversal of 55730205251 is 15250203755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55730205251 - 2² = 55730205247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55730205253) 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, 3980728940 + ... + 3980728953.

It is an arithmetic number, because the mean of its divisors is an integer number (15922915788).

Almost surely, 2^55730205251 is an apocalyptic number.

55730205251 is a deficient number, since it is larger than the sum of its proper divisors (7961457901).

55730205251 is an equidigital number, since it uses as much as digits as its factorization.

55730205251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961457900.

The product of its (nonzero) digits is 52500, while the sum is 35.

The spelling of 55730205251 in words is "fifty-five billion, seven hundred thirty million, two hundred five thousand, two hundred fifty-one".