61312571 has 4 divisors (see below), whose sum is σ = 62227752. Its totient is φ = 60397392.

The previous prime is 61312561. The next prime is 61312577. The reversal of 61312571 is 17521316.

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 61312571 - 2¹⁴ = 61296187 is a prime.

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 61312571.

It is not an unprimeable number, because it can be changed into a prime (61312577) 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, 457490 + ... + 457623.

It is an arithmetic number, because the mean of its divisors is an integer number (15556938).

Almost surely, 2^61312571 is an apocalyptic number.

61312571 is a deficient number, since it is larger than the sum of its proper divisors (915181).

61312571 is an equidigital number, since it uses as much as digits as its factorization.

61312571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915180.

The product of its digits is 1260, while the sum is 26.

The square root of 61312571 is about 7830.2344153927. The cubic root of 61312571 is about 394.3209419133.

Adding to 61312571 its reverse (17521316), we get a palindrome (78833887).

The spelling of 61312571 in words is "sixty-one million, three hundred twelve thousand, five hundred seventy-one".