1621340212 has 24 divisors (see below), whose sum is σ = 2851873920. Its totient is φ = 806531040.

The previous prime is 1621340191. The next prime is 1621340239. The reversal of 1621340212 is 2120431261.

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, 775833 + ... + 777919.

It is an arithmetic number, because the mean of its divisors is an integer number (118828080).

Almost surely, 2^1621340212 is an apocalyptic number.

It is an amenable number.

1621340212 is a deficient number, since it is larger than the sum of its proper divisors (1230533708).

1621340212 is a wasteful number, since it uses less digits than its factorization.

1621340212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1621340212 is about 40265.8690704671. The cubic root of 1621340212 is about 1174.7840766958.

Adding to 1621340212 its reverse (2120431261), we get a palindrome (3741771473).

The spelling of 1621340212 in words is "one billion, six hundred twenty-one million, three hundred forty thousand, two hundred twelve".