61615253 has 4 divisors (see below), whose sum is σ = 70417440. Its totient is φ = 52813068.

The previous prime is 61615241. The next prime is 61615297. The reversal of 61615253 is 35251616.

61615253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61615253 - 2⁶ = 61615189 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 (61615223) 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, 4401083 + ... + 4401096.

It is an arithmetic number, because the mean of its divisors is an integer number (17604360).

Almost surely, 2^61615253 is an apocalyptic number.

It is an amenable number.

61615253 is a deficient number, since it is larger than the sum of its proper divisors (8802187).

61615253 is an equidigital number, since it uses as much as digits as its factorization.

61615253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8802186.

The product of its digits is 5400, while the sum is 29.

The square root of 61615253 is about 7849.5383940713. The cubic root of 61615253 is about 394.9687589456.

Adding to 61615253 its reverse (35251616), we get a palindrome (96866869).

The spelling of 61615253 in words is "sixty-one million, six hundred fifteen thousand, two hundred fifty-three".