616122021 has 16 divisors (see below), whose sum is σ = 836785728. Its totient is φ = 403132800.

The previous prime is 616122019. The next prime is 616122029. The reversal of 616122021 is 120221616.

It is not a de Polignac number, because 616122021 - 2¹ = 616122019 is a prime.

It is a super-2 number, since 2×616122021² = 759212689522248882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616122029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86425 + ... + 93281.

It is an arithmetic number, because the mean of its divisors is an integer number (52299108).

Almost surely, 2^616122021 is an apocalyptic number.

616122021 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

616122021 is a deficient number, since it is larger than the sum of its proper divisors (220663707).

616122021 is a wasteful number, since it uses less digits than its factorization.

616122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7412.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 616122021 is about 24821.8053533582. The cubic root of 616122021 is about 850.9203507517.

Adding to 616122021 its reverse (120221616), we get a palindrome (736343637).

It can be divided in two parts, 6161 and 22021, that added together give a palindrome (28182).

The spelling of 616122021 in words is "six hundred sixteen million, one hundred twenty-two thousand, twenty-one".