100055531 has 2 divisors, whose sum is σ = 100055532. Its totient is φ = 100055530.

The previous prime is 100055509. The next prime is 100055561. The reversal of 100055531 is 135550001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100055531 is a prime.

It is a super-2 number, since 2×100055531² = 20022218567383922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100055561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50027765 + 50027766.

It is an arithmetic number, because the mean of its divisors is an integer number (50027766).

Almost surely, 2^100055531 is an apocalyptic number.

100055531 is a deficient number, since it is larger than the sum of its proper divisors (1).

100055531 is an equidigital number, since it uses as much as digits as its factorization.

100055531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 100055531 is about 10002.7761646455. The cubic root of 100055531 is about 464.2447848191.

The spelling of 100055531 in words is "one hundred million, fifty-five thousand, five hundred thirty-one".