131100001 has 8 divisors (see below), whose sum is σ = 135490824. Its totient is φ = 126766080.

The previous prime is 131099999. The next prime is 131100007. The reversal of 131100001 is 100001131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25010001 + 106090000 = 5001^2 + 10300^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131100001 - 2¹ = 131099999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131100007) 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, 9516 + ... + 18781.

It is an arithmetic number, because the mean of its divisors is an integer number (16936353).

Almost surely, 2^131100001 is an apocalyptic number.

It is an amenable number.

131100001 is a deficient number, since it is larger than the sum of its proper divisors (4390823).

131100001 is a wasteful number, since it uses less digits than its factorization.

131100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28451.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 131100001 is about 11449.8908728424. The cubic root of 131100001 is about 508.0045065940.

Adding to 131100001 its reverse (100001131), we get a palindrome (231101132).

It can be divided in two parts, 131 and 100001, that multiplied together give a palindrome (13100131).

The spelling of 131100001 in words is "one hundred thirty-one million, one hundred thousand, one".