152500021 has 2 divisors, whose sum is σ = 152500022. Its totient is φ = 152500020.

The previous prime is 152499989. The next prime is 152500037. The reversal of 152500021 is 120005251.

It is an a-pointer prime, because the next prime (152500037) can be obtained adding 152500021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144937521 + 7562500 = 12039^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 152500021 - 2⁵ = 152499989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 152499968 and 152500004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152500091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76250010 + 76250011.

It is an arithmetic number, because the mean of its divisors is an integer number (76250011).

Almost surely, 2^152500021 is an apocalyptic number.

It is an amenable number.

152500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

152500021 is an equidigital number, since it uses as much as digits as its factorization.

152500021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 152500021 is about 12349.0898854936. The cubic root of 152500021 is about 534.2648895981.

Adding to 152500021 its reverse (120005251), we get a palindrome (272505272).

The spelling of 152500021 in words is "one hundred fifty-two million, five hundred thousand, twenty-one".