148218431 has 4 divisors (see below), whose sum is σ = 148312272. Its totient is φ = 148124592.

The previous prime is 148218383. The next prime is 148218437. The reversal of 148218431 is 134812841.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134812841 = 281 ⋅479761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148218431 is a prime.

It is a super-2 number, since 2×148218431² = 43937406576203522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148218437) 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, 44510 + ... + 47723.

It is an arithmetic number, because the mean of its divisors is an integer number (37078068).

Almost surely, 2^148218431 is an apocalyptic number.

148218431 is a deficient number, since it is larger than the sum of its proper divisors (93841).

148218431 is an equidigital number, since it uses as much as digits as its factorization.

148218431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93840.

The product of its digits is 6144, while the sum is 32.

The square root of 148218431 is about 12174.4992094131. The cubic root of 148218431 is about 529.2173460655.

The spelling of 148218431 in words is "one hundred forty-eight million, two hundred eighteen thousand, four hundred thirty-one".