148197631 has 4 divisors (see below), whose sum is σ = 148850712. Its totient is φ = 147544552.

The previous prime is 148197629. The next prime is 148197641. The reversal of 148197631 is 136791841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136791841 = 241 ⋅567601.

It is not a de Polignac number, because 148197631 - 2¹ = 148197629 is a prime.

It is a super-2 number, since 2×148197631² = 43925075668024322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148197641) 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, 326200 + ... + 326653.

It is an arithmetic number, because the mean of its divisors is an integer number (37212678).

Almost surely, 2^148197631 is an apocalyptic number.

148197631 is a deficient number, since it is larger than the sum of its proper divisors (653081).

148197631 is an equidigital number, since it uses as much as digits as its factorization.

148197631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653080.

The product of its digits is 36288, while the sum is 40.

The square root of 148197631 is about 12173.6449348583. The cubic root of 148197631 is about 529.1925892799.

The spelling of 148197631 in words is "one hundred forty-eight million, one hundred ninety-seven thousand, six hundred thirty-one".