61210253 has 12 divisors (see below), whose sum is σ = 67589844. Its totient is φ = 55104000.

The previous prime is 61210241. The next prime is 61210277. The reversal of 61210253 is 35201216.

It can be written as a sum of positive squares in 6 ways, for example, as 28697449 + 32512804 = 5357^2 + 5702^2 .

It is not a de Polignac number, because 61210253 - 2⁸ = 61209997 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61210753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20453 + ... + 23253.

It is an arithmetic number, because the mean of its divisors is an integer number (5632487).

Almost surely, 2^61210253 is an apocalyptic number.

It is an amenable number.

61210253 is a deficient number, since it is larger than the sum of its proper divisors (6379591).

61210253 is a wasteful number, since it uses less digits than its factorization.

61210253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896 (or 2855 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 61210253 is about 7823.6981664683. The cubic root of 61210253 is about 394.1014730865.

Adding to 61210253 its reverse (35201216), we get a palindrome (96411469).

The spelling of 61210253 in words is "sixty-one million, two hundred ten thousand, two hundred fifty-three".