131244135 has 32 divisors (see below), whose sum is σ = 230065920. Its totient is φ = 63360000.

The previous prime is 131244133. The next prime is 131244137. The reversal of 131244135 is 531442131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131244133) and next prime (131244137).

It is not a de Polignac number, because 131244135 - 2¹ = 131244133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131244133) 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, 39831 + ... + 42999.

It is an arithmetic number, because the mean of its divisors is an integer number (7189560).

Almost surely, 2^131244135 is an apocalyptic number.

131244135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131244135 is a deficient number, since it is larger than the sum of its proper divisors (98821785).

131244135 is a wasteful number, since it uses less digits than its factorization.

131244135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439.

The product of its digits is 1440, while the sum is 24.

The square root of 131244135 is about 11456.1832649447. The cubic root of 131244135 is about 508.1906085618.

Adding to 131244135 its reverse (531442131), we get a palindrome (662686266).

The spelling of 131244135 in words is "one hundred thirty-one million, two hundred forty-four thousand, one hundred thirty-five".