71225919 has 8 divisors (see below), whose sum is σ = 105519920. Its totient is φ = 47483928.

The previous prime is 71225911. The next prime is 71225929. The reversal of 71225919 is 91952217.

It is not a de Polignac number, because 71225919 - 2³ = 71225911 is a prime.

It is a super-2 number, since 2×71225919² = 10146263074789122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71225911) 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, 1318972 + ... + 1319025.

It is an arithmetic number, because the mean of its divisors is an integer number (13189990).

Almost surely, 2^71225919 is an apocalyptic number.

71225919 is a deficient number, since it is larger than the sum of its proper divisors (34294001).

71225919 is a wasteful number, since it uses less digits than its factorization.

71225919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638006 (or 2638000 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 71225919 is about 8439.5449521879. The cubic root of 71225919 is about 414.5205068325.

It can be divided in two parts, 7122 and 5919, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 71225919 in words is "seventy-one million, two hundred twenty-five thousand, nine hundred nineteen".