1231532554345 has 32 divisors (see below), whose sum is σ = 1534227563520. Its totient is φ = 947879331840.

The previous prime is 1231532554331. The next prime is 1231532554349. The reversal of 1231532554345 is 5434552351321.

It is not a de Polignac number, because 1231532554345 - 2⁵ = 1231532554313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231532554349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69330265 + ... + 69348025.

It is an arithmetic number, because the mean of its divisors is an integer number (47944611360).

Almost surely, 2^{1231532554345} is an apocalyptic number.

It is an amenable number.

1231532554345 is a deficient number, since it is larger than the sum of its proper divisors (302695009175).

1231532554345 is a wasteful number, since it uses less digits than its factorization.

1231532554345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19465.

The product of its digits is 1080000, while the sum is 43.

The spelling of 1231532554345 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred fifty-four thousand, three hundred forty-five".