136971555 has 64 divisors (see below), whose sum is σ = 267632640. Its totient is φ = 58455936.

The previous prime is 136971503. The next prime is 136971559. The reversal of 136971555 is 555179631.

It is not a de Polignac number, because 136971555 - 2¹⁰ = 136970531 is a prime.

It is a super-2 number, since 2×136971555² = 37522413758236050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136971559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103186 + ... + 104504.

It is an arithmetic number, because the mean of its divisors is an integer number (4181760).

Almost surely, 2^136971555 is an apocalyptic number.

136971555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136971555 is a deficient number, since it is larger than the sum of its proper divisors (130661085).

136971555 is a wasteful number, since it uses less digits than its factorization.

136971555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400.

The product of its digits is 141750, while the sum is 42.

The square root of 136971555 is about 11703.4847374617. The cubic root of 136971555 is about 515.4779927655.

The spelling of 136971555 in words is "one hundred thirty-six million, nine hundred seventy-one thousand, five hundred fifty-five".