245161543 has 4 divisors (see below), whose sum is σ = 267448968. Its totient is φ = 222874120.

The previous prime is 245161537. The next prime is 245161549. The reversal of 245161543 is 345161542.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (245161537) and next prime (245161549).

It is a cyclic number.

It is not a de Polignac number, because 245161543 - 2⁹ = 245161031 is a prime.

It is a super-2 number, since 2×245161543² = 120208364332281698, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245161549) 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, 11143696 + ... + 11143717.

It is an arithmetic number, because the mean of its divisors is an integer number (66862242).

Almost surely, 2^245161543 is an apocalyptic number.

245161543 is a deficient number, since it is larger than the sum of its proper divisors (22287425).

245161543 is a wasteful number, since it uses less digits than its factorization.

245161543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22287424.

The product of its digits is 14400, while the sum is 31.

The square root of 245161543 is about 15657.6352940027. The cubic root of 245161543 is about 625.8699718365.

Subtracting 245161543 from its reverse (345161542), we obtain a palindrome (99999999).

The spelling of 245161543 in words is "two hundred forty-five million, one hundred sixty-one thousand, five hundred forty-three".