61221054 has 8 divisors (see below), whose sum is σ = 122442120. Its totient is φ = 20407016.

The previous prime is 61221047. The next prime is 61221073. The reversal of 61221054 is 45012216.

It is a sphenic number, since it is the product of 3 distinct primes.

61221054 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 61221054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5101749 + ... + 5101760.

It is an arithmetic number, because the mean of its divisors is an integer number (15305265).

Almost surely, 2^61221054 is an apocalyptic number.

61221054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61221054 is a wasteful number, since it uses less digits than its factorization.

61221054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203514.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 61221054 is about 7824.3884106044. The cubic root of 61221054 is about 394.1246524257.

The spelling of 61221054 in words is "sixty-one million, two hundred twenty-one thousand, fifty-four".