55641251 has 2 divisors, whose sum is σ = 55641252. Its totient is φ = 55641250.

The previous prime is 55641247. The next prime is 55641259. The reversal of 55641251 is 15214655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55641251 - 2² = 55641247 is a prime.

It is not a weakly prime, because it can be changed into another prime (55641259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27820625 + 27820626.

It is an arithmetic number, because the mean of its divisors is an integer number (27820626).

Almost surely, 2^55641251 is an apocalyptic number.

55641251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55641251 is an equidigital number, since it uses as much as digits as its factorization.

55641251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 29.

The square root of 55641251 is about 7459.3063350422. The cubic root of 55641251 is about 381.7675069850.

The spelling of 55641251 in words is "fifty-five million, six hundred forty-one thousand, two hundred fifty-one".