61691222 has 4 divisors (see below), whose sum is σ = 92536836. Its totient is φ = 30845610.

The previous prime is 61691219. The next prime is 61691239. The reversal of 61691222 is 22219616.

It is a happy number.

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, 15422804 + ... + 15422807.

It is an arithmetic number, because the mean of its divisors is an integer number (23134209).

Almost surely, 2^61691222 is an apocalyptic number.

61691222 is a deficient number, since it is larger than the sum of its proper divisors (30845614).

61691222 is a wasteful number, since it uses less digits than its factorization.

61691222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30845613.

The product of its digits is 2592, while the sum is 29.

The square root of 61691222 is about 7854.3759777591. The cubic root of 61691222 is about 395.1310188669.

The spelling of 61691222 in words is "sixty-one million, six hundred ninety-one thousand, two hundred twenty-two".