61550 has 12 divisors (see below), whose sum is σ = 114576. Its totient is φ = 24600.

The previous prime is 61547. The next prime is 61553. The reversal of 61550 is 5516.

It is an interprime number because it is at equal distance from previous prime (61547) and next prime (61553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (9548).

2⁶¹⁵⁵⁰ is an apocalyptic number.

61550 is a deficient number, since it is larger than the sum of its proper divisors (53026).

61550 is a wasteful number, since it uses less digits than its factorization.

61550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 61550 is about 248.0927246011. The cubic root of 61550 is about 39.4829280496.

The spelling of 61550 in words is "sixty-one thousand, five hundred fifty".