71225777 has 8 divisors (see below), whose sum is σ = 83601216. Its totient is φ = 59400432.

The previous prime is 71225747. The next prime is 71225783. The reversal of 71225777 is 77752217.

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 71225777 - 2⁸ = 71225521 is a prime.

It is a super-2 number, since 2×71225777² = 10146222618507458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71225777.

It is not an unprimeable number, because it can be changed into a prime (71225717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137243 + ... + 137760.

It is an arithmetic number, because the mean of its divisors is an integer number (10450152).

Almost surely, 2^71225777 is an apocalyptic number.

It is an amenable number.

71225777 is a deficient number, since it is larger than the sum of its proper divisors (12375439).

71225777 is a wasteful number, since it uses less digits than its factorization.

71225777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275047.

The product of its digits is 48020, while the sum is 38.

The square root of 71225777 is about 8439.5365394078. The cubic root of 71225777 is about 414.5202313619.

The spelling of 71225777 in words is "seventy-one million, two hundred twenty-five thousand, seven hundred seventy-seven".