61438222 has 4 divisors (see below), whose sum is σ = 92157336. Its totient is φ = 30719110.

The previous prime is 61438219. The next prime is 61438253. The reversal of 61438222 is 22283416.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15359554 + ... + 15359557.

It is an arithmetic number, because the mean of its divisors is an integer number (23039334).

Almost surely, 2^61438222 is an apocalyptic number.

61438222 is a deficient number, since it is larger than the sum of its proper divisors (30719114).

61438222 is a wasteful number, since it uses less digits than its factorization.

61438222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30719113.

The product of its digits is 4608, while the sum is 28.

The square root of 61438222 is about 7838.2537596074. The cubic root of 61438222 is about 394.5901254976.

It can be divided in two parts, 6143 and 8222, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 61438222 in words is "sixty-one million, four hundred thirty-eight thousand, two hundred twenty-two".