148781533 has 4 divisors (see below), whose sum is σ = 156612160. Its totient is φ = 140950908.

The previous prime is 148781527. The next prime is 148781561. The reversal of 148781533 is 335187841.

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, and also an emirpimes, since its reverse is a distinct semiprime: 335187841 = 31 ⋅10812511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148781533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148781593) 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 in 3 ways as a sum of consecutive naturals, for example, 3915285 + ... + 3915322.

It is an arithmetic number, because the mean of its divisors is an integer number (39153040).

Almost surely, 2^148781533 is an apocalyptic number.

It is an amenable number.

148781533 is a deficient number, since it is larger than the sum of its proper divisors (7830627).

148781533 is an equidigital number, since it uses as much as digits as its factorization.

148781533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830626.

The product of its digits is 80640, while the sum is 40.

The square root of 148781533 is about 12197.6035761128. The cubic root of 148781533 is about 529.8866887228.

The spelling of 148781533 in words is "one hundred forty-eight million, seven hundred eighty-one thousand, five hundred thirty-three".