61211144 has 16 divisors (see below), whose sum is σ = 114892800. Its totient is φ = 30573072.

The previous prime is 61211113. The next prime is 61211167. The reversal of 61211144 is 44111216.

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, 5177 + ... + 12215.

It is an arithmetic number, because the mean of its divisors is an integer number (7180800).

Almost surely, 2^61211144 is an apocalyptic number.

It is an amenable number.

61211144 is a deficient number, since it is larger than the sum of its proper divisors (53681656).

61211144 is a wasteful number, since it uses less digits than its factorization.

61211144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8132 (or 8128 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 61211144 is about 7823.7551086419. The cubic root of 61211144 is about 394.1033853081.

The spelling of 61211144 in words is "sixty-one million, two hundred eleven thousand, one hundred forty-four".