72071519 has 4 divisors (see below), whose sum is σ = 77615496. Its totient is φ = 66527544.

The previous prime is 72071501. The next prime is 72071533. The reversal of 72071519 is 91517027.

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-72071519 is a prime.

It is a super-2 number, since 2×72071519² = 10388607701934722, 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 (72071599) 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, 2771969 + ... + 2771994.

It is an arithmetic number, because the mean of its divisors is an integer number (19403874).

Almost surely, 2^72071519 is an apocalyptic number.

72071519 is a deficient number, since it is larger than the sum of its proper divisors (5543977).

72071519 is a wasteful number, since it uses less digits than its factorization.

72071519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543976.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 72071519 is about 8489.4946257124. The cubic root of 72071519 is about 416.1544648742.

The spelling of 72071519 in words is "seventy-two million, seventy-one thousand, five hundred nineteen".