131516104 has 8 divisors (see below), whose sum is σ = 246592710. Its totient is φ = 65758048.

The previous prime is 131516071. The next prime is 131516107. The reversal of 131516104 is 401615131.

It can be written as a sum of positive squares in only one way, i.e., 80964004 + 50552100 = 8998^2 + 7110^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×131516104² = 34592971222677632, which contains 22 as substring.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (131516107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8219749 + ... + 8219764.

Almost surely, 2^131516104 is an apocalyptic number.

It is an amenable number.

131516104 is a deficient number, since it is larger than the sum of its proper divisors (115076606).

131516104 is a wasteful number, since it uses less digits than its factorization.

131516104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16439519 (or 16439515 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 131516104 is about 11468.0470874513. The cubic root of 131516104 is about 508.5413968896.

The spelling of 131516104 in words is "one hundred thirty-one million, five hundred sixteen thousand, one hundred four".