172431129135 has 32 divisors (see below), whose sum is σ = 277473600000. Its totient is φ = 91436720256.

The previous prime is 172431129131. The next prime is 172431129151. The reversal of 172431129135 is 531921134271.

It is not a de Polignac number, because 172431129135 - 2² = 172431129131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172431129093 and 172431129102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172431129131) 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, 1970646 + ... + 2056284.

It is an arithmetic number, because the mean of its divisors is an integer number (8671050000).

Almost surely, 2^172431129135 is an apocalyptic number.

172431129135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172431129135 is a deficient number, since it is larger than the sum of its proper divisors (105042470865).

172431129135 is a wasteful number, since it uses less digits than its factorization.

172431129135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86415.

The product of its digits is 45360, while the sum is 39.

The spelling of 172431129135 in words is "one hundred seventy-two billion, four hundred thirty-one million, one hundred twenty-nine thousand, one hundred thirty-five".