152231415221 has 4 divisors (see below), whose sum is σ = 153111365772. Its totient is φ = 151351464672.

The previous prime is 152231415199. The next prime is 152231415233. The reversal of 152231415221 is 122514132251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142309263121 + 9922152100 = 377239^2 + 99610^2 .

It is a cyclic number.

It is not a de Polignac number, because 152231415221 - 2¹⁸ = 152231153077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152231415241) 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, 439975016 + ... + 439975361.

It is an arithmetic number, because the mean of its divisors is an integer number (38277841443).

Almost surely, 2^152231415221 is an apocalyptic number.

It is an amenable number.

152231415221 is a deficient number, since it is larger than the sum of its proper divisors (879950551).

152231415221 is an equidigital number, since it uses as much as digits as its factorization.

152231415221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879950550.

The product of its digits is 4800, while the sum is 29.

Adding to 152231415221 its reverse (122514132251), we get a palindrome (274745547472).

The spelling of 152231415221 in words is "one hundred fifty-two billion, two hundred thirty-one million, four hundred fifteen thousand, two hundred twenty-one".