71513122 has 4 divisors (see below), whose sum is σ = 107269686. Its totient is φ = 35756560.

The previous prime is 71513089. The next prime is 71513149. The reversal of 71513122 is 22131517.

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: 22131517 = 2141 ⋅10337.

It can be written as a sum of positive squares in only one way, i.e., 69205761 + 2307361 = 8319^2 + 1519^2 .

It is a super-2 number, since 2×71513122² = 10228253236373768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71513093 and 71513102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17878279 + ... + 17878282.

Almost surely, 2^71513122 is an apocalyptic number.

71513122 is a deficient number, since it is larger than the sum of its proper divisors (35756564).

71513122 is a wasteful number, since it uses less digits than its factorization.

71513122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35756563.

The product of its digits is 420, while the sum is 22.

The square root of 71513122 is about 8456.5431471731. The cubic root of 71513122 is about 415.0769141808.

Adding to 71513122 its reverse (22131517), we get a palindrome (93644639).

The spelling of 71513122 in words is "seventy-one million, five hundred thirteen thousand, one hundred twenty-two".