1151232531 has 8 divisors (see below), whose sum is σ = 1539401664. Its totient is φ = 765275880.

The previous prime is 1151232527. The next prime is 1151232539. The reversal of 1151232531 is 1352321511.

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

It is not a de Polignac number, because 1151232531 - 2² = 1151232527 is a prime.

It is a super-2 number, since 2×1151232531² = 2650672680865331922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1151232539) 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, 551905 + ... + 553986.

It is an arithmetic number, because the mean of its divisors is an integer number (192425208).

Almost surely, 2^1151232531 is an apocalyptic number.

1151232531 is a deficient number, since it is larger than the sum of its proper divisors (388169133).

1151232531 is a wasteful number, since it uses less digits than its factorization.

1151232531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106241.

The product of its digits is 900, while the sum is 24.

The square root of 1151232531 is about 33929.8177271850. The cubic root of 1151232531 is about 1048.0637122440.

The spelling of 1151232531 in words is "one billion, one hundred fifty-one million, two hundred thirty-two thousand, five hundred thirty-one".