996511231 has 4 divisors (see below), whose sum is σ = 999113472. Its totient is φ = 993908992.

The previous prime is 996511207. The next prime is 996511237. The reversal of 996511231 is 132115699.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 996511231 - 2²¹ = 994414079 is a prime.

It is a super-2 number, since 2×996511231² = 1986069267018270722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996511237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300546 + ... + 1301311.

It is an arithmetic number, because the mean of its divisors is an integer number (249778368).

Almost surely, 2^996511231 is an apocalyptic number.

996511231 is a deficient number, since it is larger than the sum of its proper divisors (2602241).

996511231 is a wasteful number, since it uses less digits than its factorization.

996511231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602240.

The product of its digits is 14580, while the sum is 37.

The square root of 996511231 is about 31567.5661241091. The cubic root of 996511231 is about 998.8357219828.

The spelling of 996511231 in words is "nine hundred ninety-six million, five hundred eleven thousand, two hundred thirty-one".