245561153 has 4 divisors (see below), whose sum is σ = 247327920. Its totient is φ = 243794388.

The previous prime is 245561131. The next prime is 245561159. The reversal of 245561153 is 351165542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245561153 - 2¹² = 245557057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245561159) 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, 883175 + ... + 883452.

It is an arithmetic number, because the mean of its divisors is an integer number (61831980).

Almost surely, 2^245561153 is an apocalyptic number.

It is an amenable number.

245561153 is a deficient number, since it is larger than the sum of its proper divisors (1766767).

245561153 is a wasteful number, since it uses less digits than its factorization.

245561153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766766.

The product of its digits is 18000, while the sum is 32.

The square root of 245561153 is about 15670.3909651291. The cubic root of 245561153 is about 626.2098404400.

The spelling of 245561153 in words is "two hundred forty-five million, five hundred sixty-one thousand, one hundred fifty-three".