71601951 has 4 divisors (see below), whose sum is σ = 95469272. Its totient is φ = 47734632.

The previous prime is 71601941. The next prime is 71601953. The reversal of 71601951 is 15910617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15910617 = 3 ⋅5303539.

It is not a de Polignac number, because 71601951 - 2¹³ = 71593759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71601953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11933656 + ... + 11933661.

It is an arithmetic number, because the mean of its divisors is an integer number (23867318).

Almost surely, 2^71601951 is an apocalyptic number.

71601951 is a deficient number, since it is larger than the sum of its proper divisors (23867321).

71601951 is a wasteful number, since it uses less digits than its factorization.

71601951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23867320.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 71601951 is about 8461.7936041953. The cubic root of 71601951 is about 415.2487036860.

The spelling of 71601951 in words is "seventy-one million, six hundred one thousand, nine hundred fifty-one".