128231653 has 8 divisors (see below), whose sum is σ = 140186880. Its totient is φ = 116326080.

The previous prime is 128231617. The next prime is 128231657. The reversal of 128231653 is 356132821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128231653 is a prime.

It is a super-2 number, since 2×128231653² = 32886713662224818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128231657) 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, 6900 + ... + 17437.

It is an arithmetic number, because the mean of its divisors is an integer number (17523360).

Almost surely, 2^128231653 is an apocalyptic number.

It is an amenable number.

128231653 is a deficient number, since it is larger than the sum of its proper divisors (11955227).

128231653 is a wasteful number, since it uses less digits than its factorization.

128231653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24827.

The product of its digits is 8640, while the sum is 31.

The square root of 128231653 is about 11323.9415840952. The cubic root of 128231653 is about 504.2722622462.

The spelling of 128231653 in words is "one hundred twenty-eight million, two hundred thirty-one thousand, six hundred fifty-three".