245021351 has 4 divisors (see below), whose sum is σ = 245243400. Its totient is φ = 244799304.

The previous prime is 245021347. The next prime is 245021389. The reversal of 245021351 is 153120542.

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 245021351 - 2² = 245021347 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 (245021251) 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, 109361 + ... + 111578.

It is an arithmetic number, because the mean of its divisors is an integer number (61310850).

Almost surely, 2^245021351 is an apocalyptic number.

245021351 is a deficient number, since it is larger than the sum of its proper divisors (222049).

245021351 is a wasteful number, since it uses less digits than its factorization.

245021351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222048.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 245021351 is about 15653.1578603169. The cubic root of 245021351 is about 625.7506509295.

Adding to 245021351 its reverse (153120542), we get a palindrome (398141893).

The spelling of 245021351 in words is "two hundred forty-five million, twenty-one thousand, three hundred fifty-one".