1151323631 has 8 divisors (see below), whose sum is σ = 1156624560. Its totient is φ = 1146031488.

The previous prime is 1151323619. The next prime is 1151323633. The reversal of 1151323631 is 1363231511.

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

It is a cyclic number.

It is not a de Polignac number, because 1151323631 - 2⁶ = 1151323567 is a prime.

It is a super-2 number, since 2×1151323631² = 2651092206598048322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1151323631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151323633) 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, 491060 + ... + 493398.

It is an arithmetic number, because the mean of its divisors is an integer number (144578070).

Almost surely, 2^1151323631 is an apocalyptic number.

1151323631 is a deficient number, since it is larger than the sum of its proper divisors (5300929).

1151323631 is a wasteful number, since it uses less digits than its factorization.

1151323631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393.

The product of its digits is 1620, while the sum is 26.

The square root of 1151323631 is about 33931.1601776302. The cubic root of 1151323631 is about 1048.0913568433.

The spelling of 1151323631 in words is "one billion, one hundred fifty-one million, three hundred twenty-three thousand, six hundred thirty-one".