100235521 has 2 divisors, whose sum is σ = 100235522. Its totient is φ = 100235520.

The previous prime is 100235503. The next prime is 100235543. The reversal of 100235521 is 125532001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83466496 + 16769025 = 9136^2 + 4095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100235521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100235501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50117760 + 50117761.

It is an arithmetic number, because the mean of its divisors is an integer number (50117761).

Almost surely, 2^100235521 is an apocalyptic number.

It is an amenable number.

100235521 is a deficient number, since it is larger than the sum of its proper divisors (1).

100235521 is an equidigital number, since it uses as much as digits as its factorization.

100235521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 100235521 is about 10011.7691243856. The cubic root of 100235521 is about 464.5229948722.

Adding to 100235521 its reverse (125532001), we get a palindrome (225767522).

The spelling of 100235521 in words is "one hundred million, two hundred thirty-five thousand, five hundred twenty-one".