131621610 has 32 divisors (see below), whose sum is σ = 317509632. Its totient is φ = 34919360.

The previous prime is 131621597. The next prime is 131621627. The reversal of 131621610 is 16126131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5226 + ... + 17045.

It is an arithmetic number, because the mean of its divisors is an integer number (9922176).

Almost surely, 2^131621610 is an apocalyptic number.

131621610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131621610 is an abundant number, since it is smaller than the sum of its proper divisors (185888022).

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

131621610 is a wasteful number, since it uses less digits than its factorization.

131621610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22478.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 131621610 is about 11472.6461638107. The cubic root of 131621610 is about 508.6773493845.

Adding to 131621610 its reverse (16126131), we get a palindrome (147747741).

It can be divided in two parts, 131621 and 610, that added together give a palindrome (132231).

The spelling of 131621610 in words is "one hundred thirty-one million, six hundred twenty-one thousand, six hundred ten".