71506151 has 4 divisors (see below), whose sum is σ = 71709072. Its totient is φ = 71303232.

The previous prime is 71506117. The next prime is 71506189. The reversal of 71506151 is 15160517.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71506151 - 2⁶ = 71506087 is a prime.

It is a super-2 number, since 2×71506151² = 10226259261669602, 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 71506151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71506111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100931 + ... + 101636.

It is an arithmetic number, because the mean of its divisors is an integer number (17927268).

Almost surely, 2^71506151 is an apocalyptic number.

71506151 is a deficient number, since it is larger than the sum of its proper divisors (202921).

71506151 is a wasteful number, since it uses less digits than its factorization.

71506151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202920.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 71506151 is about 8456.1309710765. The cubic root of 71506151 is about 415.0634267018.

Adding to 71506151 its reverse (15160517), we get a palindrome (86666668).

The spelling of 71506151 in words is "seventy-one million, five hundred six thousand, one hundred fifty-one".