145311013 has 4 divisors (see below), whose sum is σ = 145847488. Its totient is φ = 144774540.

The previous prime is 145310989. The next prime is 145311059. The reversal of 145311013 is 310113541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310113541 = 17 ⋅18241973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145311013 is a prime.

It is a super-2 number, since 2×145311013² = 42230580998172338, which 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 (145311073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267831 + ... + 268372.

It is an arithmetic number, because the mean of its divisors is an integer number (36461872).

Almost surely, 2^145311013 is an apocalyptic number.

It is an amenable number.

145311013 is a deficient number, since it is larger than the sum of its proper divisors (536475).

145311013 is an equidigital number, since it uses as much as digits as its factorization.

145311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536474.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 145311013 is about 12054.5017731966. The cubic root of 145311013 is about 525.7341360533.

Adding to 145311013 its reverse (310113541), we get a palindrome (455424554).

The spelling of 145311013 in words is "one hundred forty-five million, three hundred eleven thousand, thirteen".