1231512153 has 8 divisors (see below), whose sum is σ = 1643879328. Its totient is φ = 820076544.

The previous prime is 1231512137. The next prime is 1231512167. The reversal of 1231512153 is 3512151321.

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

It is not a de Polignac number, because 1231512153 - 2⁴ = 1231512137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231512853) 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, 229800 + ... + 235097.

It is an arithmetic number, because the mean of its divisors is an integer number (205484916).

Almost surely, 2^1231512153 is an apocalyptic number.

It is an amenable number.

1231512153 is a deficient number, since it is larger than the sum of its proper divisors (412367175).

1231512153 is an equidigital number, since it uses as much as digits as its factorization.

1231512153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465783.

The product of its digits is 900, while the sum is 24.

The square root of 1231512153 is about 35092.9074458073. The cubic root of 1231512153 is about 1071.8801639012.

Adding to 1231512153 its reverse (3512151321), we get a palindrome (4743663474).

It can be divided in two parts, 1231512 and 153, that added together give a triangular number (1231665 = T₁₅₆₉).

The spelling of 1231512153 in words is "one billion, two hundred thirty-one million, five hundred twelve thousand, one hundred fifty-three".