100521413 has 2 divisors, whose sum is σ = 100521414. Its totient is φ = 100521412.

The previous prime is 100521403. The next prime is 100521439. The reversal of 100521413 is 314125001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82864609 + 17656804 = 9103^2 + 4202^2 .

It is a cyclic number.

It is not a de Polignac number, because 100521413 - 2⁴ = 100521397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100521391 and 100521400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100521403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50260706 + 50260707.

It is an arithmetic number, because the mean of its divisors is an integer number (50260707).

Almost surely, 2^100521413 is an apocalyptic number.

It is an amenable number.

100521413 is a deficient number, since it is larger than the sum of its proper divisors (1).

100521413 is an equidigital number, since it uses as much as digits as its factorization.

100521413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 100521413 is about 10026.0367543711. The cubic root of 100521413 is about 464.9642135330.

Adding to 100521413 its reverse (314125001), we get a palindrome (414646414).

The spelling of 100521413 in words is "one hundred million, five hundred twenty-one thousand, four hundred thirteen".