1620221342 has 16 divisors (see below), whose sum is σ = 2543117472. Its totient is φ = 773341920.

The previous prime is 1620221311. The next prime is 1620221359. The reversal of 1620221342 is 2431220261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202634 + ... + 210477.

It is an arithmetic number, because the mean of its divisors is an integer number (158944842).

Almost surely, 2^1620221342 is an apocalyptic number.

1620221342 is a deficient number, since it is larger than the sum of its proper divisors (922896130).

1620221342 is a wasteful number, since it uses less digits than its factorization.

1620221342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413203.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1620221342 is about 40251.9731441826. The cubic root of 1620221342 is about 1174.5137790897.

The spelling of 1620221342 in words is "one billion, six hundred twenty million, two hundred twenty-one thousand, three hundred forty-two".