1205155133431 has 12 divisors (see below), whose sum is σ = 1306299035352. Its totient is φ = 1110868446384.

The previous prime is 1205155133411. The next prime is 1205155133437. The reversal of 1205155133431 is 1343315515021.

It is a de Polignac number, because none of the positive numbers 2^k-1205155133431 is a prime.

It is a super-4 number, since 4×1205155133431⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205155133437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45099885 + ... + 45126598.

It is an arithmetic number, because the mean of its divisors is an integer number (108858252946).

Almost surely, 2^{1205155133431} is an apocalyptic number.

1205155133431 is a deficient number, since it is larger than the sum of its proper divisors (101143901921).

1205155133431 is an equidigital number, since it uses as much as digits as its factorization.

1205155133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90226558 (or 90226539 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 1205155133431 in words is "one trillion, two hundred five billion, one hundred fifty-five million, one hundred thirty-three thousand, four hundred thirty-one".