72150161 has 8 divisors (see below), whose sum is σ = 73507200. Its totient is φ = 70805952.

The previous prime is 72150137. The next prime is 72150167. The reversal of 72150161 is 16105127.

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 72150161 - 2¹⁸ = 71888017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72150167) 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, 8540 + ... + 14738.

It is an arithmetic number, because the mean of its divisors is an integer number (9188400).

Almost surely, 2^72150161 is an apocalyptic number.

It is an amenable number.

72150161 is a deficient number, since it is larger than the sum of its proper divisors (1357039).

72150161 is a wasteful number, since it uses less digits than its factorization.

72150161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 72150161 is about 8494.1250873766. The cubic root of 72150161 is about 416.3057744043.

Adding to 72150161 its reverse (16105127), we get a palindrome (88255288).

The spelling of 72150161 in words is "seventy-two million, one hundred fifty thousand, one hundred sixty-one".