136782531 has 12 divisors (see below), whose sum is σ = 204388080. Its totient is φ = 88043760.

The previous prime is 136782521. The next prime is 136782553. The reversal of 136782531 is 135287631.

It is not a de Polignac number, because 136782531 - 2⁶ = 136782467 is a prime.

It is a super-2 number, since 2×136782531² = 37418921573531922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (136782511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261775 + ... + 262296.

It is an arithmetic number, because the mean of its divisors is an integer number (17032340).

Almost surely, 2^136782531 is an apocalyptic number.

136782531 is a deficient number, since it is larger than the sum of its proper divisors (67605549).

136782531 is a wasteful number, since it uses less digits than its factorization.

136782531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524106 (or 524103 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 136782531 is about 11695.4064059356. The cubic root of 136782531 is about 515.2407596441.

The spelling of 136782531 in words is "one hundred thirty-six million, seven hundred eighty-two thousand, five hundred thirty-one".