172540422 has 64 divisors (see below), whose sum is σ = 391372800. Its totient is φ = 56337120.

The previous prime is 172540409. The next prime is 172540441. The reversal of 172540422 is 224045271.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 953172 + ... + 953352.

It is an arithmetic number, because the mean of its divisors is an integer number (6115200).

Almost surely, 2^172540422 is an apocalyptic number.

172540422 is an abundant number, since it is smaller than the sum of its proper divisors (218832378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172540422 is a wasteful number, since it uses less digits than its factorization.

172540422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 172540422 is about 13135.4642856657. The cubic root of 172540422 is about 556.7116187937.

Adding to 172540422 its reverse (224045271), we get a palindrome (396585693).

The spelling of 172540422 in words is "one hundred seventy-two million, five hundred forty thousand, four hundred twenty-two".