150133781 has 4 divisors (see below), whose sum is σ = 171581472. Its totient is φ = 128686092.

The previous prime is 150133777. The next prime is 150133799. The reversal of 150133781 is 187331051.

150133781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 150133781 - 2² = 150133777 is a prime.

It is a super-2 number, since 2×150133781² = 45080304394711922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150133751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10723835 + ... + 10723848.

It is an arithmetic number, because the mean of its divisors is an integer number (42895368).

Almost surely, 2^150133781 is an apocalyptic number.

It is an amenable number.

150133781 is a deficient number, since it is larger than the sum of its proper divisors (21447691).

150133781 is an equidigital number, since it uses as much as digits as its factorization.

150133781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21447690.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 150133781 is about 12252.9090831525. The cubic root of 150133781 is about 531.4871971280.

The spelling of 150133781 in words is "one hundred fifty million, one hundred thirty-three thousand, seven hundred eighty-one".