1154161031 has 4 divisors (see below), whose sum is σ = 1191392064. Its totient is φ = 1116930000.

The previous prime is 1154161013. The next prime is 1154161081. The reversal of 1154161031 is 1301614511.

It is a happy number.

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

It is not a de Polignac number, because 1154161031 - 2⁶ = 1154160967 is a prime.

It is a super-2 number, since 2×1154161031² = 2664175370957965922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1154160988 and 1154161006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154161081) 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, 18615470 + ... + 18615531.

It is an arithmetic number, because the mean of its divisors is an integer number (297848016).

Almost surely, 2^1154161031 is an apocalyptic number.

1154161031 is a deficient number, since it is larger than the sum of its proper divisors (37231033).

1154161031 is an equidigital number, since it uses as much as digits as its factorization.

1154161031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37231032.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1154161031 is about 33972.9455743832. The cubic root of 1154161031 is about 1048.9516463066.

Adding to 1154161031 its reverse (1301614511), we get a palindrome (2455775542).

The spelling of 1154161031 in words is "one billion, one hundred fifty-four million, one hundred sixty-one thousand, thirty-one".