1151513531 has 16 divisors (see below), whose sum is σ = 1353746688. Its totient is φ = 959104800.

The previous prime is 1151513509. The next prime is 1151513537. The reversal of 1151513531 is 1353151511.

It is a cyclic number.

It is not a de Polignac number, because 1151513531 - 2¹⁰ = 1151512507 is a prime.

It is a super-2 number, since 2×1151513531² = 2651966824152175922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1151513531.

It is not an unprimeable number, because it can be changed into a prime (1151513537) 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, 19196 + ... + 51686.

It is an arithmetic number, because the mean of its divisors is an integer number (84609168).

Almost surely, 2^1151513531 is an apocalyptic number.

1151513531 is a deficient number, since it is larger than the sum of its proper divisors (202233157).

1151513531 is an equidigital number, since it uses as much as digits as its factorization.

1151513531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32642.

The product of its digits is 1125, while the sum is 26.

The square root of 1151513531 is about 33933.9583750555. The cubic root of 1151513531 is about 1048.1489779446.

The spelling of 1151513531 in words is "one billion, one hundred fifty-one million, five hundred thirteen thousand, five hundred thirty-one".