150475981 has 2 divisors, whose sum is σ = 150475982. Its totient is φ = 150475980.

The previous prime is 150475973. The next prime is 150476009. The reversal of 150475981 is 189574051.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 68211081 = 9070^2 + 8259^2 .

It is a cyclic number.

It is not a de Polignac number, because 150475981 - 2³ = 150475973 is a prime.

It is a super-2 number, since 2×150475981² = 45286041715824722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150475921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75237990 + 75237991.

It is an arithmetic number, because the mean of its divisors is an integer number (75237991).

Almost surely, 2^150475981 is an apocalyptic number.

It is an amenable number.

150475981 is a deficient number, since it is larger than the sum of its proper divisors (1).

150475981 is an equidigital number, since it uses as much as digits as its factorization.

150475981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 150475981 is about 12266.8651659664. The cubic root of 150475981 is about 531.8906970595.

The spelling of 150475981 in words is "one hundred fifty million, four hundred seventy-five thousand, nine hundred eighty-one".