128547331 has 16 divisors (see below), whose sum is σ = 148947840. Its totient is φ = 109710720.

The previous prime is 128547317. The next prime is 128547337. The reversal of 128547331 is 133745821.

It is a cyclic number.

It is not a de Polignac number, because 128547331 - 2⁷ = 128547203 is a prime.

It is a super-2 number, since 2×128547331² = 33048832614447122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128547337) 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, 20896 + ... + 26338.

It is an arithmetic number, because the mean of its divisors is an integer number (9309240).

Almost surely, 2^128547331 is an apocalyptic number.

128547331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128547331 is a deficient number, since it is larger than the sum of its proper divisors (20400509).

128547331 is a wasteful number, since it uses less digits than its factorization.

128547331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5586.

The product of its digits is 20160, while the sum is 34.

The square root of 128547331 is about 11337.8715374624. The cubic root of 128547331 is about 504.6857254475.

The spelling of 128547331 in words is "one hundred twenty-eight million, five hundred forty-seven thousand, three hundred thirty-one".