100151581 has 2 divisors, whose sum is σ = 100151582. Its totient is φ = 100151580.

The previous prime is 100151537. The next prime is 100151599. The reversal of 100151581 is 185151001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75846681 + 24304900 = 8709^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 100151581 - 2²³ = 91762973 is a prime.

It is a super-2 number, since 2×100151581² = 20060678353599122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100151531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50075790 + 50075791.

It is an arithmetic number, because the mean of its divisors is an integer number (50075791).

Almost surely, 2^100151581 is an apocalyptic number.

It is an amenable number.

100151581 is a deficient number, since it is larger than the sum of its proper divisors (1).

100151581 is an equidigital number, since it uses as much as digits as its factorization.

100151581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 22.

The square root of 100151581 is about 10007.5761800748. The cubic root of 100151581 is about 464.3932905212.

The spelling of 100151581 in words is "one hundred million, one hundred fifty-one thousand, five hundred eighty-one".