71122131 has 20 divisors (see below), whose sum is σ = 108255312. Its totient is φ = 46517328.

The previous prime is 71122027. The next prime is 71122147. The reversal of 71122131 is 13122117.

It is a happy number.

It is not a de Polignac number, because 71122131 - 2²¹ = 69024979 is a prime.

It is a super-2 number, since 2×71122131² = 10116715035962322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71122171) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3991 + ... + 12576.

Almost surely, 2^71122131 is an apocalyptic number.

71122131 is a deficient number, since it is larger than the sum of its proper divisors (37133181).

71122131 is a wasteful number, since it uses less digits than its factorization.

71122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632 (or 16623 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 71122131 is about 8433.3938008372. The cubic root of 71122131 is about 414.3190672032.

Adding to 71122131 its reverse (13122117), we get a palindrome (84244248).

It can be divided in two parts, 71122 and 131, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 71122131 in words is "seventy-one million, one hundred twenty-two thousand, one hundred thirty-one".