244020551 has 4 divisors (see below), whose sum is σ = 245259432. Its totient is φ = 242781672.

The previous prime is 244020541. The next prime is 244020559. The reversal of 244020551 is 155020442.

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 244020551 - 2⁶ = 244020487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244020559) 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, 619145 + ... + 619538.

It is an arithmetic number, because the mean of its divisors is an integer number (61314858).

Almost surely, 2^244020551 is an apocalyptic number.

244020551 is a deficient number, since it is larger than the sum of its proper divisors (1238881).

244020551 is a wasteful number, since it uses less digits than its factorization.

244020551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238880.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 244020551 is about 15621.1571594424. The cubic root of 244020551 is about 624.8975200508.

Adding to 244020551 its reverse (155020442), we get a palindrome (399040993).

The spelling of 244020551 in words is "two hundred forty-four million, twenty thousand, five hundred fifty-one".