71144156 has 6 divisors (see below), whose sum is σ = 124502280. Its totient is φ = 35572076.

The previous prime is 71144153. The next prime is 71144159. The reversal of 71144156 is 65144117.

It is an interprime number because it is at equal distance from previous prime (71144153) and next prime (71144159).

It is a super-2 number, since 2×71144156² = 10122981865904672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71144153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8893016 + ... + 8893023.

It is an arithmetic number, because the mean of its divisors is an integer number (20750380).

Almost surely, 2^71144156 is an apocalyptic number.

It is an amenable number.

71144156 is a deficient number, since it is larger than the sum of its proper divisors (53358124).

71144156 is a wasteful number, since it uses less digits than its factorization.

71144156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17786043 (or 17786041 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 71144156 is about 8434.6995204334. The cubic root of 71144156 is about 414.3618313683.

The spelling of 71144156 in words is "seventy-one million, one hundred forty-four thousand, one hundred fifty-six".