131431552 has 64 divisors (see below), whose sum is σ = 305706240. Its totient is φ = 55111680.

The previous prime is 131431523. The next prime is 131431633. The reversal of 131431552 is 255134131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×131431552² = 34548505722257408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40552 + ... + 43672.

It is an arithmetic number, because the mean of its divisors is an integer number (4776660).

Almost surely, 2^131431552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131431552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152853120).

131431552 is an abundant number, since it is smaller than the sum of its proper divisors (174274688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131431552 is an equidigital number, since it uses as much as digits as its factorization.

131431552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189 (or 3177 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 131431552 is about 11464.3600780855. The cubic root of 131431552 is about 508.4323927228.

Adding to 131431552 its reverse (255134131), we get a palindrome (386565683).

The spelling of 131431552 in words is "one hundred thirty-one million, four hundred thirty-one thousand, five hundred fifty-two".