148251509 has 54 divisors (see below), whose sum is σ = 200013570. Its totient is φ = 109396224.

The previous prime is 148251497. The next prime is 148251541. The reversal of 148251509 is 905152841.

148251509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 61575409 + 86676100 = 7847^2 + 9310^2 .

It is not a de Polignac number, because 148251509 - 2²⁰ = 147202933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148251569) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 5112107 + ... + 5112135.

It is an arithmetic number, because the mean of its divisors is an integer number (3703955).

Almost surely, 2^148251509 is an apocalyptic number.

148251509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

148251509 is a deficient number, since it is larger than the sum of its proper divisors (51762061).

148251509 is a wasteful number, since it uses less digits than its factorization.

148251509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 148251509 is about 12175.8576289311. The cubic root of 148251509 is about 529.2567117260.

The spelling of 148251509 in words is "one hundred forty-eight million, two hundred fifty-one thousand, five hundred nine".