148381631 has 4 divisors (see below), whose sum is σ = 148554432. Its totient is φ = 148208832.

The previous prime is 148381613. The next prime is 148381633. The reversal of 148381631 is 136183841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136183841 = 157 ⋅867413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148381631 is a prime.

It is a super-2 number, since 2×148381631² = 44034216836440322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 148381591 and 148381600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148381633) 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, 85106 + ... + 86831.

It is an arithmetic number, because the mean of its divisors is an integer number (37138608).

Almost surely, 2^148381631 is an apocalyptic number.

148381631 is a deficient number, since it is larger than the sum of its proper divisors (172801).

148381631 is an equidigital number, since it uses as much as digits as its factorization.

148381631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172800.

The product of its digits is 13824, while the sum is 35.

The square root of 148381631 is about 12181.1998998457. The cubic root of 148381631 is about 529.4115112812.

The spelling of 148381631 in words is "one hundred forty-eight million, three hundred eighty-one thousand, six hundred thirty-one".