616212421 has 8 divisors (see below), whose sum is σ = 672645600. Its totient is φ = 559848240.

The previous prime is 616212361. The next prime is 616212431. The reversal of 616212421 is 124212616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616212421 - 2¹³ = 616204229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616212431) 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, 2410 + ... + 35188.

It is an arithmetic number, because the mean of its divisors is an integer number (84080700).

Almost surely, 2^616212421 is an apocalyptic number.

It is an amenable number.

616212421 is a deficient number, since it is larger than the sum of its proper divisors (56433179).

616212421 is a wasteful number, since it uses less digits than its factorization.

616212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34499.

The product of its digits is 1152, while the sum is 25.

The square root of 616212421 is about 24823.6262661199. The cubic root of 616212421 is about 850.9619655808.

The spelling of 616212421 in words is "six hundred sixteen million, two hundred twelve thousand, four hundred twenty-one".