245457551 has 2 divisors, whose sum is σ = 245457552. Its totient is φ = 245457550.

The previous prime is 245457533. The next prime is 245457571. The reversal of 245457551 is 155754542.

245457551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245457551 - 2¹⁸ = 245195407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245457571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122728775 + 122728776.

It is an arithmetic number, because the mean of its divisors is an integer number (122728776).

Almost surely, 2^245457551 is an apocalyptic number.

245457551 is a deficient number, since it is larger than the sum of its proper divisors (1).

245457551 is an equidigital number, since it uses as much as digits as its factorization.

245457551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140000, while the sum is 38.

The square root of 245457551 is about 15667.0849554089. The cubic root of 245457551 is about 626.1217622878.

The spelling of 245457551 in words is "two hundred forty-five million, four hundred fifty-seven thousand, five hundred fifty-one".