61371517 has 4 divisors (see below), whose sum is σ = 61565436. Its totient is φ = 61177600.

The previous prime is 61371503. The next prime is 61371523. The reversal of 61371517 is 71517316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37810201 + 23561316 = 6149^2 + 4854^2 .

It is a cyclic number.

It is not a de Polignac number, because 61371517 - 2⁷ = 61371389 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61371587) 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, 96484 + ... + 97117.

It is an arithmetic number, because the mean of its divisors is an integer number (15391359).

Almost surely, 2^61371517 is an apocalyptic number.

It is an amenable number.

61371517 is a deficient number, since it is larger than the sum of its proper divisors (193919).

61371517 is a wasteful number, since it uses less digits than its factorization.

61371517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193918.

The product of its digits is 4410, while the sum is 31.

The square root of 61371517 is about 7833.9975108497. The cubic root of 61371517 is about 394.4472683583.

The spelling of 61371517 in words is "sixty-one million, three hundred seventy-one thousand, five hundred seventeen".