61223478 has 16 divisors (see below), whose sum is σ = 122837040. Its totient is φ = 20342816.

The previous prime is 61223471. The next prime is 61223479. The reversal of 61223478 is 87432216.

61223478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61223471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14193 + ... + 17996.

It is an arithmetic number, because the mean of its divisors is an integer number (7677315).

Almost surely, 2^61223478 is an apocalyptic number.

61223478 is an abundant number, since it is smaller than the sum of its proper divisors (61613562).

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

61223478 is a wasteful number, since it uses less digits than its factorization.

61223478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32511.

The product of its digits is 16128, while the sum is 33.

The square root of 61223478 is about 7824.5433093568. The cubic root of 61223478 is about 394.1298540434.

It can be divided in two parts, 612 and 23478, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 61223478 in words is "sixty-one million, two hundred twenty-three thousand, four hundred seventy-eight".