245442551 has 4 divisors (see below), whose sum is σ = 258360600. Its totient is φ = 232524504.

The previous prime is 245442521. The next prime is 245442557. The reversal of 245442551 is 155244542.

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 245442551 - 2¹⁰ = 245441527 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 (245442557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6458996 + ... + 6459033.

It is an arithmetic number, because the mean of its divisors is an integer number (64590150).

Almost surely, 2^245442551 is an apocalyptic number.

245442551 is a deficient number, since it is larger than the sum of its proper divisors (12918049).

245442551 is a wasteful number, since it uses less digits than its factorization.

245442551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12918048.

The product of its digits is 32000, while the sum is 32.

The square root of 245442551 is about 15666.6062374721. The cubic root of 245442551 is about 626.1090078519.

The spelling of 245442551 in words is "two hundred forty-five million, four hundred forty-two thousand, five hundred fifty-one".