148781513 has 4 divisors (see below), whose sum is σ = 153911940. Its totient is φ = 143651088.

The previous prime is 148781491. The next prime is 148781527. The reversal of 148781513 is 315187841.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53465344 + 95316169 = 7312^2 + 9763^2 .

It is a cyclic number.

It is not a de Polignac number, because 148781513 - 2¹⁴ = 148765129 is a prime.

It is a super-2 number, since 2×148781513² = 44271877221138338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148781593) 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, 2565170 + ... + 2565227.

It is an arithmetic number, because the mean of its divisors is an integer number (38477985).

Almost surely, 2^148781513 is an apocalyptic number.

It is an amenable number.

148781513 is a deficient number, since it is larger than the sum of its proper divisors (5130427).

148781513 is an equidigital number, since it uses as much as digits as its factorization.

148781513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130426.

The product of its digits is 26880, while the sum is 38.

The square root of 148781513 is about 12197.6027562796. The cubic root of 148781513 is about 529.8866649794.

The spelling of 148781513 in words is "one hundred forty-eight million, seven hundred eighty-one thousand, five hundred thirteen".