61283550 has 48 divisors (see below), whose sum is σ = 159989760. Its totient is φ = 15481440.

The previous prime is 61283543. The next prime is 61283567. The reversal of 61283550 is 5538216.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7902 + ... + 13601.

It is an arithmetic number, because the mean of its divisors is an integer number (3333120).

Almost surely, 2^61283550 is an apocalyptic number.

61283550 is an abundant number, since it is smaller than the sum of its proper divisors (98706210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61283550 is a wasteful number, since it uses less digits than its factorization.

61283550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21537 (or 21532 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 61283550 is about 7828.3810586864. The cubic root of 61283550 is about 394.2587176208.

The spelling of 61283550 in words is "sixty-one million, two hundred eighty-three thousand, five hundred fifty".