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131988106 = 2292275657
BaseRepresentation
bin1111101110111…
…11101010001010
3100012100200122101
413313133222022
5232242104411
621032544014
73161610655
oct767375212
9305320571
10131988106
116855a688
123825200a
1321463693
141375a89c
15b8c28c1
hex7ddfa8a

131988106 has 8 divisors (see below), whose sum is σ = 204809220. Its totient is φ = 63718368.

The previous prime is 131988097. The next prime is 131988107. The reversal of 131988106 is 601889131.

It can be written as a sum of positive squares in 2 ways, for example, as 131675625 + 312481 = 11475^2 + 559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (131988107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137771 + ... + 1137886.

Almost surely, 2131988106 is an apocalyptic number.

131988106 is a deficient number, since it is larger than the sum of its proper divisors (72821114).

131988106 is a wasteful number, since it uses less digits than its factorization.

131988106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275688.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 131988106 is about 11488.6076615054. The cubic root of 131988106 is about 509.1490435757.

The spelling of 131988106 in words is "one hundred thirty-one million, nine hundred eighty-eight thousand, one hundred six".