1155170715531 has 8 divisors (see below), whose sum is σ = 1760260137984. Its totient is φ = 660097551720.

The previous prime is 1155170715527. The next prime is 1155170715593. The reversal of 1155170715531 is 1355170715511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155170715531 - 2² = 1155170715527 is a prime.

It is a super-2 number, since 2×1155170715531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155170715931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27504064635 + ... + 27504064676.

It is an arithmetic number, because the mean of its divisors is an integer number (220032517248).

Almost surely, 2^{1155170715531} is an apocalyptic number.

1155170715531 is a deficient number, since it is larger than the sum of its proper divisors (605089422453).

1155170715531 is an equidigital number, since it uses as much as digits as its factorization.

1155170715531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55008129321.

The product of its (nonzero) digits is 91875, while the sum is 42.

The spelling of 1155170715531 in words is "one trillion, one hundred fifty-five billion, one hundred seventy million, seven hundred fifteen thousand, five hundred thirty-one".