172425333421 has 8 divisors (see below), whose sum is σ = 196278640704. Its totient is φ = 149935072320.

The previous prime is 172425333391. The next prime is 172425333427. The reversal of 172425333421 is 124333524271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172425333421 - 2⁷ = 172425333293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172425333427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340761276 + ... + 340761781.

It is an arithmetic number, because the mean of its divisors is an integer number (24534830088).

Almost surely, 2^172425333421 is an apocalyptic number.

172425333421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172425333421 is a deficient number, since it is larger than the sum of its proper divisors (23853307283).

172425333421 is a wasteful number, since it uses less digits than its factorization.

172425333421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681523091.

The product of its digits is 120960, while the sum is 37.

Adding to 172425333421 its reverse (124333524271), we get a palindrome (296758857692).

The spelling of 172425333421 in words is "one hundred seventy-two billion, four hundred twenty-five million, three hundred thirty-three thousand, four hundred twenty-one".