71131955 has 4 divisors (see below), whose sum is σ = 85358352. Its totient is φ = 56905560.

The previous prime is 71131937. The next prime is 71131969. The reversal of 71131955 is 55913117.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55913117 = 13 ⋅4301009.

It is not a de Polignac number, because 71131955 - 2¹⁶ = 71066419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7113191 + ... + 7113200.

It is an arithmetic number, because the mean of its divisors is an integer number (21339588).

Almost surely, 2^71131955 is an apocalyptic number.

71131955 is a deficient number, since it is larger than the sum of its proper divisors (14226397).

71131955 is a wasteful number, since it uses less digits than its factorization.

71131955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226396.

The product of its digits is 4725, while the sum is 32.

The square root of 71131955 is about 8433.9762271422. The cubic root of 71131955 is about 414.3381427618.

The spelling of 71131955 in words is "seventy-one million, one hundred thirty-one thousand, nine hundred fifty-five".