145232131 has 4 divisors (see below), whose sum is σ = 158435064. Its totient is φ = 132029200.

The previous prime is 145232111. The next prime is 145232147. The reversal of 145232131 is 131232541.

It is a happy number.

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 145232131 - 2¹¹ = 145230083 is a prime.

It is a super-2 number, since 2×145232131² = 42184743749602322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) 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 not an unprimeable number, because it can be changed into a prime (145232111) 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, 6601450 + ... + 6601471.

It is an arithmetic number, because the mean of its divisors is an integer number (39608766).

Almost surely, 2^145232131 is an apocalyptic number.

145232131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145232131 is a deficient number, since it is larger than the sum of its proper divisors (13202933).

145232131 is a wasteful number, since it uses less digits than its factorization.

145232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13202932.

The product of its digits is 720, while the sum is 22.

The square root of 145232131 is about 12051.2294393560. The cubic root of 145232131 is about 525.6389873427.

Adding to 145232131 its reverse (131232541), we get a palindrome (276464672).

The spelling of 145232131 in words is "one hundred forty-five million, two hundred thirty-two thousand, one hundred thirty-one".