152116621 has 2 divisors, whose sum is σ = 152116622. Its totient is φ = 152116620.

The previous prime is 152116609. The next prime is 152116637. The reversal of 152116621 is 126611251.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137592900 + 14523721 = 11730^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 152116621 - 2²¹ = 150019469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152116681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76058310 + 76058311.

It is an arithmetic number, because the mean of its divisors is an integer number (76058311).

Almost surely, 2^152116621 is an apocalyptic number.

It is an amenable number.

152116621 is a deficient number, since it is larger than the sum of its proper divisors (1).

152116621 is an equidigital number, since it uses as much as digits as its factorization.

152116621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 152116621 is about 12333.5567051844. The cubic root of 152116621 is about 533.8167824268.

Adding to 152116621 its reverse (126611251), we get a palindrome (278727872).

The spelling of 152116621 in words is "one hundred fifty-two million, one hundred sixteen thousand, six hundred twenty-one".