128325031 has 16 divisors (see below), whose sum is σ = 138399840. Its totient is φ = 118939392.

The previous prime is 128325013. The next prime is 128325037. The reversal of 128325031 is 130523821.

It is not a de Polignac number, because 128325031 - 2²¹ = 126227879 is a prime.

It is a super-2 number, since 2×128325031² = 32934627162301922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128324987 and 128325005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128325037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363351 + ... + 363703.

It is an arithmetic number, because the mean of its divisors is an integer number (8649990).

Almost surely, 2^128325031 is an apocalyptic number.

128325031 is a deficient number, since it is larger than the sum of its proper divisors (10074809).

128325031 is an frugal number, since it uses more digits than its factorization.

128325031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 128325031 is about 11328.0638681109. The cubic root of 128325031 is about 504.3946358543.

Adding to 128325031 its reverse (130523821), we get a palindrome (258848852).

The spelling of 128325031 in words is "one hundred twenty-eight million, three hundred twenty-five thousand, thirty-one".