148321531 has 4 divisors (see below), whose sum is σ = 148440600. Its totient is φ = 148202464.

The previous prime is 148321529. The next prime is 148321541. The reversal of 148321531 is 135123841.

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: 135123841 = 991 ⋅136351.

It is a cyclic number.

It is not a de Polignac number, because 148321531 - 2¹ = 148321529 is a prime.

It is a super-2 number, since 2×148321531² = 43998553116367922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148321531.

It is not an unprimeable number, because it can be changed into a prime (148321501) 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, 57646 + ... + 60163.

It is an arithmetic number, because the mean of its divisors is an integer number (37110150).

Almost surely, 2^148321531 is an apocalyptic number.

148321531 is a deficient number, since it is larger than the sum of its proper divisors (119069).

148321531 is a wasteful number, since it uses less digits than its factorization.

148321531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119068.

The product of its digits is 2880, while the sum is 28.

The square root of 148321531 is about 12178.7327337453. The cubic root of 148321531 is about 529.3400246056.

The spelling of 148321531 in words is "one hundred forty-eight million, three hundred twenty-one thousand, five hundred thirty-one".