55011251 has 4 divisors (see below), whose sum is σ = 57906600. Its totient is φ = 52115904.

The previous prime is 55011227. The next prime is 55011277. The reversal of 55011251 is 15211055.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55011251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55010251) 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, 1447646 + ... + 1447683.

It is an arithmetic number, because the mean of its divisors is an integer number (14476650).

Almost surely, 2^55011251 is an apocalyptic number.

55011251 is a deficient number, since it is larger than the sum of its proper divisors (2895349).

55011251 is a wasteful number, since it uses less digits than its factorization.

55011251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895348.

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

The square root of 55011251 is about 7416.9569905723. The cubic root of 55011251 is about 380.3211758343.

The spelling of 55011251 in words is "fifty-five million, eleven thousand, two hundred fifty-one".