61502313 has 16 divisors (see below), whose sum is σ = 83825280. Its totient is φ = 40095744.

The previous prime is 61502303. The next prime is 61502317. The reversal of 61502313 is 31320516.

It is not a de Polignac number, because 61502313 - 2¹⁸ = 61240169 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61502313.

It is not an unprimeable number, because it can be changed into a prime (61502317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79593 + ... + 80361.

It is an arithmetic number, because the mean of its divisors is an integer number (5239080).

Almost surely, 2^61502313 is an apocalyptic number.

It is an amenable number.

61502313 is a deficient number, since it is larger than the sum of its proper divisors (22322967).

61502313 is a wasteful number, since it uses less digits than its factorization.

61502313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 61502313 is about 7842.3410407862. The cubic root of 61502313 is about 394.7272870567.

Adding to 61502313 its reverse (31320516), we get a palindrome (92822829).

The spelling of 61502313 in words is "sixty-one million, five hundred two thousand, three hundred thirteen".