152502221 has 2 divisors, whose sum is σ = 152502222. Its totient is φ = 152502220.

The previous prime is 152502211. The next prime is 152502241. The reversal of 152502221 is 122205251.

It is a happy number.

It is an a-pointer prime, because the next prime (152502241) can be obtained adding 152502221 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145684900 + 6817321 = 12070^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 152502221 - 2⁶ = 152502157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 152502193 and 152502202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152502211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76251110 + 76251111.

It is an arithmetic number, because the mean of its divisors is an integer number (76251111).

Almost surely, 2^152502221 is an apocalyptic number.

It is an amenable number.

152502221 is a deficient number, since it is larger than the sum of its proper divisors (1).

152502221 is an equidigital number, since it uses as much as digits as its factorization.

152502221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 152502221 is about 12349.1789605625. The cubic root of 152502221 is about 534.2674587280.

Adding to 152502221 its reverse (122205251), we get a palindrome (274707472).

It can be divided in two parts, 15250 and 2221, that added together give a palindrome (17471).

The spelling of 152502221 in words is "one hundred fifty-two million, five hundred two thousand, two hundred twenty-one".