100045531 has 2 divisors, whose sum is σ = 100045532. Its totient is φ = 100045530.

The previous prime is 100045513. The next prime is 100045537. The reversal of 100045531 is 135540001.

Together with previous prime (100045513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100045531 - 2⁷ = 100045403 is a prime.

It is a super-2 number, since 2×100045531² = 20018216546143922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100045499 and 100045508.

It is not a weakly prime, because it can be changed into another prime (100045537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50022765 + 50022766.

It is an arithmetic number, because the mean of its divisors is an integer number (50022766).

Almost surely, 2^100045531 is an apocalyptic number.

100045531 is a deficient number, since it is larger than the sum of its proper divisors (1).

100045531 is an equidigital number, since it uses as much as digits as its factorization.

100045531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 100045531 is about 10002.2762909250. The cubic root of 100045531 is about 464.2293180662.

Adding to 100045531 its reverse (135540001), we get a palindrome (235585532).

It can be divided in two parts, 100045 and 531, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 100045531 in words is "one hundred million, forty-five thousand, five hundred thirty-one".