72151131 has 8 divisors (see below), whose sum is σ = 103601680. Its totient is φ = 44400672.

The previous prime is 72151129. The next prime is 72151139. The reversal of 72151131 is 13115127.

It is a happy number.

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

It is not a de Polignac number, because 72151131 - 2¹ = 72151129 is a prime.

It is a super-2 number, since 2×72151131² = 10411571409158322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72151098 and 72151107.

It is not an unprimeable number, because it can be changed into a prime (72151139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924976 + ... + 925053.

It is an arithmetic number, because the mean of its divisors is an integer number (12950210).

Almost surely, 2^72151131 is an apocalyptic number.

72151131 is a deficient number, since it is larger than the sum of its proper divisors (31450549).

72151131 is a wasteful number, since it uses less digits than its factorization.

72151131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850045.

The product of its digits is 210, while the sum is 21.

The square root of 72151131 is about 8494.1821854726. The cubic root of 72151131 is about 416.3076400263.

Adding to 72151131 its reverse (13115127), we get a palindrome (85266258).

The spelling of 72151131 in words is "seventy-two million, one hundred fifty-one thousand, one hundred thirty-one".