72701131 has 4 divisors (see below), whose sum is σ = 72722232. Its totient is φ = 72680032.

The previous prime is 72701119. The next prime is 72701141. The reversal of 72701131 is 13110727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72701131 - 2¹⁵ = 72668363 is a prime.

It is a super-2 number, since 2×72701131² = 10570908897358322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72701141) 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 3 ways as a sum of consecutive naturals, for example, 4045 + ... + 12718.

It is an arithmetic number, because the mean of its divisors is an integer number (18180558).

Almost surely, 2^72701131 is an apocalyptic number.

72701131 is a deficient number, since it is larger than the sum of its proper divisors (21101).

72701131 is a wasteful number, since it uses less digits than its factorization.

72701131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21100.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 72701131 is about 8526.4958218485. The cubic root of 72701131 is about 417.3627856542.

Adding to 72701131 its reverse (13110727), we get a palindrome (85811858).

The spelling of 72701131 in words is "seventy-two million, seven hundred one thousand, one hundred thirty-one".