148918281 has 4 divisors (see below), whose sum is σ = 198557712. Its totient is φ = 99278852.

The previous prime is 148918243. The next prime is 148918291. The reversal of 148918281 is 182819841.

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: 182819841 = 3 ⋅60939947.

It is a cyclic number.

It is not a de Polignac number, because 148918281 - 2¹⁷ = 148787209 is a prime.

It is a super-2 number, since 2×148918281² = 44353308831989922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (148918291) 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, 24819711 + ... + 24819716.

It is an arithmetic number, because the mean of its divisors is an integer number (49639428).

Almost surely, 2^148918281 is an apocalyptic number.

It is an amenable number.

148918281 is a deficient number, since it is larger than the sum of its proper divisors (49639431).

148918281 is an equidigital number, since it uses as much as digits as its factorization.

148918281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49639430.

The product of its digits is 36864, while the sum is 42.

The square root of 148918281 is about 12203.2078159802. The cubic root of 148918281 is about 530.0489820637.

The spelling of 148918281 in words is "one hundred forty-eight million, nine hundred eighteen thousand, two hundred eighty-one".