61272550 has 24 divisors (see below), whose sum is σ = 115535016. Its totient is φ = 24171840.

The previous prime is 61272517. The next prime is 61272553. The reversal of 61272550 is 5527216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61272553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4744 + ... + 12043.

It is an arithmetic number, because the mean of its divisors is an integer number (4813959).

Almost surely, 2^61272550 is an apocalyptic number.

61272550 is a deficient number, since it is larger than the sum of its proper divisors (54262466).

61272550 is a wasteful number, since it uses less digits than its factorization.

61272550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16872 (or 16867 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 61272550 is about 7827.6784553276. The cubic root of 61272550 is about 394.2351272478.

Adding to 61272550 its reverse (5527216), we get a palindrome (66799766).

The spelling of 61272550 in words is "sixty-one million, two hundred seventy-two thousand, five hundred fifty".