131229515 has 16 divisors (see below), whose sum is σ = 159300000. Its totient is φ = 103775232.

The previous prime is 131229503. The next prime is 131229533. The reversal of 131229515 is 515922131.

It is a cyclic number.

It is not a de Polignac number, because 131229515 - 2²² = 127035211 is a prime.

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, 262736 + ... + 263234.

It is an arithmetic number, because the mean of its divisors is an integer number (9956250).

Almost surely, 2^131229515 is an apocalyptic number.

131229515 is a deficient number, since it is larger than the sum of its proper divisors (28070485).

131229515 is a wasteful number, since it uses less digits than its factorization.

131229515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its digits is 2700, while the sum is 29.

The square root of 131229515 is about 11455.5451638060. The cubic root of 131229515 is about 508.1717378199.

The spelling of 131229515 in words is "one hundred thirty-one million, two hundred twenty-nine thousand, five hundred fifteen".