72155011 has 8 divisors (see below), whose sum is σ = 76068864. Its totient is φ = 68340360.

The previous prime is 72154997. The next prime is 72155029. The reversal of 72155011 is 11055127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72155011 - 2⁷ = 72154883 is a prime.

It is a super-2 number, since 2×72155011² = 10412691224820242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72155081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23305 + ... + 26218.

It is an arithmetic number, because the mean of its divisors is an integer number (9508608).

Almost surely, 2^72155011 is an apocalyptic number.

72155011 is a deficient number, since it is larger than the sum of its proper divisors (3913853).

72155011 is a wasteful number, since it uses less digits than its factorization.

72155011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49601.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 72155011 is about 8494.4105740187. The cubic root of 72155011 is about 416.3151023473.

The spelling of 72155011 in words is "seventy-two million, one hundred fifty-five thousand, eleven".