145561131243 has 96 divisors (see below), whose sum is σ = 241325360640. Its totient is φ = 86943144960.

The previous prime is 145561131223. The next prime is 145561131263. The reversal of 145561131243 is 342131165541.

145561131243 is a `hidden beast` number, since 1 + 4 + 5 + 5 + 611 + 31 + 2 + 4 + 3 = 666.

145561131243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145561131223) and next prime (145561131263).

It is not a de Polignac number, because 145561131243 - 2¹⁶ = 145561065707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145561131198 and 145561131207.

It is not an unprimeable number, because it can be changed into a prime (145561131223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69745546 + ... + 69747632.

It is an arithmetic number, because the mean of its divisors is an integer number (2513805840).

Almost surely, 2^145561131243 is an apocalyptic number.

145561131243 is a deficient number, since it is larger than the sum of its proper divisors (95764229397).

145561131243 is a wasteful number, since it uses less digits than its factorization.

145561131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479 (or 2467 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 145561131243 its reverse (342131165541), we get a palindrome (487692296784).

The spelling of 145561131243 in words is "one hundred forty-five billion, five hundred sixty-one million, one hundred thirty-one thousand, two hundred forty-three".