131722755 has 32 divisors (see below), whose sum is σ = 215986176. Its totient is φ = 68525184.

The previous prime is 131722741. The next prime is 131722757. The reversal of 131722755 is 557227131.

It is a happy number.

It is not a de Polignac number, because 131722755 - 2⁴ = 131722739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131722757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176914 + ... + 177656.

It is an arithmetic number, because the mean of its divisors is an integer number (6749568).

Almost surely, 2^131722755 is an apocalyptic number.

131722755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131722755 is a deficient number, since it is larger than the sum of its proper divisors (84263421).

131722755 is a wasteful number, since it uses less digits than its factorization.

131722755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 14700, while the sum is 33.

The square root of 131722755 is about 11477.0534110459. The cubic root of 131722755 is about 508.8076142073.

Adding to 131722755 its reverse (557227131), we get a palindrome (688949886).

The spelling of 131722755 in words is "one hundred thirty-one million, seven hundred twenty-two thousand, seven hundred fifty-five".