145677831 has 12 divisors (see below), whose sum is σ = 210328488. Its totient is φ = 89647584.

The previous prime is 145677823. The next prime is 145677841. The reversal of 145677831 is 138776541.

It is not a de Polignac number, because 145677831 - 2³ = 145677823 is a prime.

It is a super-2 number, since 2×145677831² = 42444060889729122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145677841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143160 + ... + 144173.

It is an arithmetic number, because the mean of its divisors is an integer number (17527374).

Almost surely, 2^145677831 is an apocalyptic number.

145677831 is a deficient number, since it is larger than the sum of its proper divisors (64650657).

145677831 is a wasteful number, since it uses less digits than its factorization.

145677831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287362 (or 287349 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 145677831 is about 12069.7071629762. The cubic root of 145677831 is about 526.1761459051.

The spelling of 145677831 in words is "one hundred forty-five million, six hundred seventy-seven thousand, eight hundred thirty-one".