145105031 has 4 divisors (see below), whose sum is σ = 147483864. Its totient is φ = 142726200.

The previous prime is 145105021. The next prime is 145105039. The reversal of 145105031 is 130501541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145105031 is a prime.

It is a super-2 number, since 2×145105031² = 42110940043021922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145104994 and 145105012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145105039) 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, 1189325 + ... + 1189446.

It is an arithmetic number, because the mean of its divisors is an integer number (36870966).

Almost surely, 2^145105031 is an apocalyptic number.

145105031 is a deficient number, since it is larger than the sum of its proper divisors (2378833).

145105031 is an equidigital number, since it uses as much as digits as its factorization.

145105031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378832.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 145105031 is about 12045.9549642193. The cubic root of 145105031 is about 525.4856048152.

Adding to 145105031 its reverse (130501541), we get a palindrome (275606572).

The spelling of 145105031 in words is "one hundred forty-five million, one hundred five thousand, thirty-one".