61221044 has 6 divisors (see below), whose sum is σ = 107136834. Its totient is φ = 30610520.

The previous prime is 61221011. The next prime is 61221047. The reversal of 61221044 is 44012216.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 68644 = 7820^2 + 262^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61221047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7652627 + ... + 7652634.

It is an arithmetic number, because the mean of its divisors is an integer number (17856139).

Almost surely, 2^61221044 is an apocalyptic number.

It is an amenable number.

61221044 is a deficient number, since it is larger than the sum of its proper divisors (45915790).

61221044 is a wasteful number, since it uses less digits than its factorization.

61221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15305265 (or 15305263 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 61221044 is about 7824.3877715768. The cubic root of 61221044 is about 394.1246309666.

The spelling of 61221044 in words is "sixty-one million, two hundred twenty-one thousand, forty-four".