61561214 has 16 divisors (see below), whose sum is σ = 108486000. Its totient is φ = 25829760.

The previous prime is 61561193. The next prime is 61561219. The reversal of 61561214 is 41216516.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107339 + ... + 107910.

It is an arithmetic number, because the mean of its divisors is an integer number (6780375).

Almost surely, 2^61561214 is an apocalyptic number.

61561214 is a deficient number, since it is larger than the sum of its proper divisors (46924786).

61561214 is a wasteful number, since it uses less digits than its factorization.

61561214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215275.

The product of its digits is 1440, while the sum is 26.

The square root of 61561214 is about 7846.0954620754. The cubic root of 61561214 is about 394.8532574611.

The spelling of 61561214 in words is "sixty-one million, five hundred sixty-one thousand, two hundred fourteen".