428232101 has 16 divisors (see below), whose sum is σ = 490624128. Its totient is φ = 369969600.

The previous prime is 428232071. The next prime is 428232131. The reversal of 428232101 is 101232824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (428232071) and next prime (428232131).

It is not a de Polignac number, because 428232101 - 2⁶ = 428232037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428232131) 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, 34331 + ... + 45111.

It is an arithmetic number, because the mean of its divisors is an integer number (30664008).

Almost surely, 2^428232101 is an apocalyptic number.

It is an amenable number.

428232101 is a deficient number, since it is larger than the sum of its proper divisors (62392027).

428232101 is a wasteful number, since it uses less digits than its factorization.

428232101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 428232101 is about 20693.7696179309. The cubic root of 428232101 is about 753.7484056925.

Adding to 428232101 its reverse (101232824), we get a palindrome (529464925).

The spelling of 428232101 in words is "four hundred twenty-eight million, two hundred thirty-two thousand, one hundred one".