131432644 has 48 divisors (see below), whose sum is σ = 282320640. Its totient is φ = 52254720.

The previous prime is 131432641. The next prime is 131432647. The reversal of 131432644 is 446234131.

It is an interprime number because it is at equal distance from previous prime (131432641) and next prime (131432647).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (131432641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31852 + ... + 35740.

It is an arithmetic number, because the mean of its divisors is an integer number (5881680).

Almost surely, 2^131432644 is an apocalyptic number.

131432644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131432644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141160320).

131432644 is an abundant number, since it is smaller than the sum of its proper divisors (150887996).

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

131432644 is a wasteful number, since it uses less digits than its factorization.

131432644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988 (or 3986 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 131432644 is about 11464.4077038458. The cubic root of 131432644 is about 508.4338008236.

Adding to 131432644 its reverse (446234131), we get a palindrome (577666775).

The spelling of 131432644 in words is "one hundred thirty-one million, four hundred thirty-two thousand, six hundred forty-four".