1154155431 has 32 divisors (see below), whose sum is σ = 1812287232. Its totient is φ = 644117760.

The previous prime is 1154155403. The next prime is 1154155447. The reversal of 1154155431 is 1345514511.

It is not a de Polignac number, because 1154155431 - 2⁶ = 1154155367 is a prime.

It is a super-2 number, since 2×1154155431² = 2664149517813591522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154153431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187011 + ... + 193083.

It is an arithmetic number, because the mean of its divisors is an integer number (56633976).

Almost surely, 2^1154155431 is an apocalyptic number.

1154155431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1154155431 is a deficient number, since it is larger than the sum of its proper divisors (658131801).

1154155431 is a wasteful number, since it uses less digits than its factorization.

1154155431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543.

The product of its digits is 6000, while the sum is 30.

The square root of 1154155431 is about 33972.8631557601. The cubic root of 1154155431 is about 1048.9499497961.

Adding to 1154155431 its reverse (1345514511), we get a palindrome (2499669942).

The spelling of 1154155431 in words is "one billion, one hundred fifty-four million, one hundred fifty-five thousand, four hundred thirty-one".