1091258351531 has 4 divisors (see below), whose sum is σ = 1101853092912. Its totient is φ = 1080663610152.

The previous prime is 1091258351507. The next prime is 1091258351537. The reversal of 1091258351531 is 1351538521901.

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

It is a cyclic number.

It is not a de Polignac number, because 1091258351531 - 2¹⁴ = 1091258335147 is a prime.

It is a super-2 number, since 2×1091258351531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091258351537) 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 3 ways as a sum of consecutive naturals, for example, 5297370536 + ... + 5297370741.

It is an arithmetic number, because the mean of its divisors is an integer number (275463273228).

Almost surely, 2^{1091258351531} is an apocalyptic number.

1091258351531 is a deficient number, since it is larger than the sum of its proper divisors (10594741381).

1091258351531 is a wasteful number, since it uses less digits than its factorization.

1091258351531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10594741380.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 1091258351531 in words is "one trillion, ninety-one billion, two hundred fifty-eight million, three hundred fifty-one thousand, five hundred thirty-one".