131640470 has 16 divisors (see below), whose sum is σ = 255180240. Its totient is φ = 48605664.

The previous prime is 131640451. The next prime is 131640479. The reversal of 131640470 is 74046131.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131640479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506180 + ... + 506439.

It is an arithmetic number, because the mean of its divisors is an integer number (15948765).

Almost surely, 2^131640470 is an apocalyptic number.

131640470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131640470 is a deficient number, since it is larger than the sum of its proper divisors (123539770).

131640470 is a wasteful number, since it uses less digits than its factorization.

131640470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012639.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 131640470 is about 11473.4680894662. The cubic root of 131640470 is about 508.7016442720.

The spelling of 131640470 in words is "one hundred thirty-one million, six hundred forty thousand, four hundred seventy".