61730253 has 24 divisors (see below), whose sum is σ = 96696600. Its totient is φ = 37722240.

The previous prime is 61730243. The next prime is 61730257. The reversal of 61730253 is 35203716.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 233289 + 61496964 = 483^2 + 7842^2 .

It is not a de Polignac number, because 61730253 - 2⁴ = 61730237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61730257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15663 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (4029025).

Almost surely, 2^61730253 is an apocalyptic number.

It is an amenable number.

61730253 is a deficient number, since it is larger than the sum of its proper divisors (34966347).

61730253 is a wasteful number, since it uses less digits than its factorization.

61730253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709 (or 3706 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 61730253 is about 7856.8602507618. The cubic root of 61730253 is about 395.2143322187.

Adding to 61730253 its reverse (35203716), we get a palindrome (96933969).

The spelling of 61730253 in words is "sixty-one million, seven hundred thirty thousand, two hundred fifty-three".