128622031 has 4 divisors (see below), whose sum is σ = 128644864. Its totient is φ = 128599200.

The previous prime is 128621993. The next prime is 128622079. The reversal of 128622031 is 130226821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128622031 - 2¹³ = 128613839 is a prime.

It is a super-2 number, since 2×128622031² = 33087253717129922, 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 = 128621987 and 128622005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128622631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3751 + ... + 16471.

It is an arithmetic number, because the mean of its divisors is an integer number (32161216).

Almost surely, 2^128622031 is an apocalyptic number.

128622031 is a deficient number, since it is larger than the sum of its proper divisors (22833).

128622031 is a wasteful number, since it uses less digits than its factorization.

128622031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22832.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 128622031 is about 11341.1653281310. The cubic root of 128622031 is about 504.7834656421.

Adding to 128622031 its reverse (130226821), we get a palindrome (258848852).

The spelling of 128622031 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, thirty-one".