1161411531 has 16 divisors (see below), whose sum is σ = 1794015744. Its totient is φ = 654571584.

The previous prime is 1161411529. The next prime is 1161411541. The reversal of 1161411531 is 1351141611.

It is not a de Polignac number, because 1161411531 - 2¹ = 1161411529 is a prime.

It is a super-2 number, since 2×1161411531² = 2697753488679527922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161411541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377271 + ... + 380336.

It is an arithmetic number, because the mean of its divisors is an integer number (112125984).

Almost surely, 2^1161411531 is an apocalyptic number.

1161411531 is a deficient number, since it is larger than the sum of its proper divisors (632604213).

1161411531 is an equidigital number, since it uses as much as digits as its factorization.

1161411531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757690.

The product of its digits is 360, while the sum is 24.

The square root of 1161411531 is about 34079.4884204561. The cubic root of 1161411531 is about 1051.1435857811.

The spelling of 1161411531 in words is "one billion, one hundred sixty-one million, four hundred eleven thousand, five hundred thirty-one".