152215561 has 4 divisors (see below), whose sum is σ = 152241300. Its totient is φ = 152189824.

The previous prime is 152215559. The next prime is 152215573. The reversal of 152215561 is 165512251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165512251 = 29 ⋅5707319.

It can be written as a sum of positive squares in 2 ways, for example, as 82810000 + 69405561 = 9100^2 + 8331^2 .

It is a cyclic number.

It is not a de Polignac number, because 152215561 - 2¹ = 152215559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152215361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945 + ... + 17473.

It is an arithmetic number, because the mean of its divisors is an integer number (38060325).

Almost surely, 2^152215561 is an apocalyptic number.

It is an amenable number.

152215561 is a deficient number, since it is larger than the sum of its proper divisors (25739).

152215561 is an equidigital number, since it uses as much as digits as its factorization.

152215561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25738.

The product of its digits is 3000, while the sum is 28.

The square root of 152215561 is about 12337.5670616212. The cubic root of 152215561 is about 533.9324927404.

The spelling of 152215561 in words is "one hundred fifty-two million, two hundred fifteen thousand, five hundred sixty-one".