1151011631 has 16 divisors (see below), whose sum is σ = 1438145280. Its totient is φ = 894943680.

The previous prime is 1151011591. The next prime is 1151011633. The reversal of 1151011631 is 1361101511.

It is a cyclic number.

It is not a de Polignac number, because 1151011631 - 2¹⁴ = 1150995247 is a prime.

It is a super-2 number, since 2×1151011631² = 2649655549394560322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151011633) 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, 19955 + ... + 51963.

It is an arithmetic number, because the mean of its divisors is an integer number (89884080).

Almost surely, 2^1151011631 is an apocalyptic number.

1151011631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1151011631 is a deficient number, since it is larger than the sum of its proper divisors (287133649).

1151011631 is a wasteful number, since it uses less digits than its factorization.

1151011631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32494.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1151011631 is about 33926.5623221687. The cubic root of 1151011631 is about 1047.9966733452.

The spelling of 1151011631 in words is "one billion, one hundred fifty-one million, eleven thousand, six hundred thirty-one".