71225019 has 12 divisors (see below), whose sum is σ = 108932616. Its totient is φ = 44690112.

The previous prime is 71224987. The next prime is 71225023. The reversal of 71225019 is 91052217.

It is not a de Polignac number, because 71225019 - 2⁵ = 71224987 is a prime.

It is a super-2 number, since 2×71225019² = 10146006663100722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71224983 and 71225001.

It is not an unprimeable number, because it can be changed into a prime (71225059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232609 + ... + 232914.

It is an arithmetic number, because the mean of its divisors is an integer number (9077718).

Almost surely, 2^71225019 is an apocalyptic number.

71225019 is a deficient number, since it is larger than the sum of its proper divisors (37707597).

71225019 is a wasteful number, since it uses less digits than its factorization.

71225019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465546 (or 465543 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 71225019 is about 8439.4916316091. The cubic root of 71225019 is about 414.5187608856.

The spelling of 71225019 in words is "seventy-one million, two hundred twenty-five thousand, nineteen".