100428531 has 8 divisors (see below), whose sum is σ = 153033984. Its totient is φ = 57387720.

The previous prime is 100428529. The next prime is 100428541. The reversal of 100428531 is 135824001.

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

It is not a de Polignac number, because 100428531 - 2¹ = 100428529 is a prime.

It is a super-3 number, since 3×100428531³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (100428541) 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, 2391135 + ... + 2391176.

It is an arithmetic number, because the mean of its divisors is an integer number (19129248).

Almost surely, 2^100428531 is an apocalyptic number.

100428531 is a deficient number, since it is larger than the sum of its proper divisors (52605453).

100428531 is an equidigital number, since it uses as much as digits as its factorization.

100428531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782321.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 100428531 is about 10021.4036442007. The cubic root of 100428531 is about 464.8209600934.

The spelling of 100428531 in words is "one hundred million, four hundred twenty-eight thousand, five hundred thirty-one".