1018091531 has 2 divisors, whose sum is σ = 1018091532. Its totient is φ = 1018091530.

The previous prime is 1018091489. The next prime is 1018091539. The reversal of 1018091531 is 1351908101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018091531 is a prime.

It is a super-2 number, since 2×1018091531² = 2073020730987847922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1018091494 and 1018091503.

It is not a weakly prime, because it can be changed into another prime (1018091539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509045765 + 509045766.

It is an arithmetic number, because the mean of its divisors is an integer number (509045766).

Almost surely, 2^1018091531 is an apocalyptic number.

1018091531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018091531 is an equidigital number, since it uses as much as digits as its factorization.

1018091531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 1018091531 is about 31907.5466151818. The cubic root of 1018091531 is about 1005.9945044474.

Adding to 1018091531 its reverse (1351908101), we get a palindrome (2369999632).

The spelling of 1018091531 in words is "one billion, eighteen million, ninety-one thousand, five hundred thirty-one".