1621341316 has 24 divisors (see below), whose sum is σ = 3318096320. Its totient is φ = 678700512.

The previous prime is 1621341313. The next prime is 1621341329. The reversal of 1621341316 is 6131431261.

It is a super-2 number, since 2×1621341316² = 5257495325937223712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1621341313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672111 + ... + 674518.

Almost surely, 2^1621341316 is an apocalyptic number.

It is an amenable number.

1621341316 is an abundant number, since it is smaller than the sum of its proper divisors (1696755004).

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

1621341316 is a wasteful number, since it uses less digits than its factorization.

1621341316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346683 (or 1346681 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1621341316 is about 40265.8827793456. The cubic root of 1621341316 is about 1174.7843433397.

Adding to 1621341316 its reverse (6131431261), we get a palindrome (7752772577).

The spelling of 1621341316 in words is "one billion, six hundred twenty-one million, three hundred forty-one thousand, three hundred sixteen".