131423040 has 448 divisors, whose sum is σ = 553029120. Its totient is φ = 28753920.

The previous prime is 131423027. The next prime is 131423051. The reversal of 131423040 is 40324131.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2479654 + ... + 2479706.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^131423040 is an apocalyptic number.

131423040 is a gapful number since it is divisible by the number (10) 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 131423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276514560).

131423040 is an abundant number, since it is smaller than the sum of its proper divisors (421606080).

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

131423040 is a wasteful number, since it uses less digits than its factorization.

131423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131423040 is about 11463.9888346073. The cubic root of 131423040 is about 508.4214164899.

Adding to 131423040 its reverse (40324131), we get a palindrome (171747171).

The spelling of 131423040 in words is "one hundred thirty-one million, four hundred twenty-three thousand, forty".