44013513 has 16 divisors (see below), whose sum is σ = 62246016. Its totient is φ = 27603840.

The previous prime is 44013509. The next prime is 44013517. The reversal of 44013513 is 31531044.

It is an interprime number because it is at equal distance from previous prime (44013509) and next prime (44013517).

It is not a de Polignac number, because 44013513 - 2² = 44013509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44013513.

It is not an unprimeable number, because it can be changed into a prime (44013517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020 + ... + 9437.

It is an arithmetic number, because the mean of its divisors is an integer number (3890376).

Almost surely, 2^44013513 is an apocalyptic number.

It is an amenable number.

44013513 is a deficient number, since it is larger than the sum of its proper divisors (18232503).

44013513 is a wasteful number, since it uses less digits than its factorization.

44013513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10544.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 44013513 is about 6634.2680832176. The cubic root of 44013513 is about 353.0709704373.

Adding to 44013513 its reverse (31531044), we get a palindrome (75544557).

The spelling of 44013513 in words is "forty-four million, thirteen thousand, five hundred thirteen".