148021091831 has 4 divisors (see below), whose sum is σ = 148059157200. Its totient is φ = 147983026464.

The previous prime is 148021091759. The next prime is 148021091843. The reversal of 148021091831 is 138190120841.

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

It is a cyclic number.

It is not a de Polignac number, because 148021091831 - 2²² = 148016897527 is a prime.

It is a super-2 number, since 2×148021091831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148021091891) 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, 19026851 + ... + 19034628.

It is an arithmetic number, because the mean of its divisors is an integer number (37014789300).

Almost surely, 2^148021091831 is an apocalyptic number.

148021091831 is a deficient number, since it is larger than the sum of its proper divisors (38065369).

148021091831 is an equidigital number, since it uses as much as digits as its factorization.

148021091831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38065368.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 148021091831 in words is "one hundred forty-eight billion, twenty-one million, ninety-one thousand, eight hundred thirty-one".