131645472 has 96 divisors (see below), whose sum is σ = 397135872. Its totient is φ = 37403904.

The previous prime is 131645443. The next prime is 131645473. The reversal of 131645472 is 274546131.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (131645473) 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, 152113 + ... + 152975.

It is an arithmetic number, because the mean of its divisors is an integer number (4136832).

Almost surely, 2^131645472 is an apocalyptic number.

131645472 is a gapful number since it is divisible by the number (12) 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 131645472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198567936).

131645472 is an abundant number, since it is smaller than the sum of its proper divisors (265490400).

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

131645472 is a wasteful number, since it uses less digits than its factorization.

131645472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1102 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 131645472 is about 11473.6860685658. The cubic root of 131645472 is about 508.7080873094.

The spelling of 131645472 in words is "one hundred thirty-one million, six hundred forty-five thousand, four hundred seventy-two".