145871983731 has 4 divisors (see below), whose sum is σ = 194495978312. Its totient is φ = 97247989152.

The previous prime is 145871983727. The next prime is 145871983843. The reversal of 145871983731 is 137389178541.

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

It is not a de Polignac number, because 145871983731 - 2² = 145871983727 is a prime.

It is a super-2 number, since 2×145871983731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145871983711) 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, 24311997286 + ... + 24311997291.

It is an arithmetic number, because the mean of its divisors is an integer number (48623994578).

Almost surely, 2^145871983731 is an apocalyptic number.

145871983731 is a deficient number, since it is larger than the sum of its proper divisors (48623994581).

145871983731 is an equidigital number, since it uses as much as digits as its factorization.

145871983731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48623994580.

The product of its digits is 5080320, while the sum is 57.

The spelling of 145871983731 in words is "one hundred forty-five billion, eight hundred seventy-one million, nine hundred eighty-three thousand, seven hundred thirty-one".