131211045 has 24 divisors (see below), whose sum is σ = 259923456. Its totient is φ = 59982048.

The previous prime is 131211043. The next prime is 131211089. The reversal of 131211045 is 540112131.

It is not a de Polignac number, because 131211045 - 2¹ = 131211043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207957 + ... + 208586.

It is an arithmetic number, because the mean of its divisors is an integer number (10830144).

Almost surely, 2^131211045 is an apocalyptic number.

131211045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131211045 is a deficient number, since it is larger than the sum of its proper divisors (128712411).

131211045 is a wasteful number, since it uses less digits than its factorization.

131211045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416561 (or 416558 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 131211045 is about 11454.7389756380. The cubic root of 131211045 is about 508.1478956927.

Adding to 131211045 its reverse (540112131), we get a palindrome (671323176).

The spelling of 131211045 in words is "one hundred thirty-one million, two hundred eleven thousand, forty-five".