305020153 has 2 divisors, whose sum is σ = 305020154. Its totient is φ = 305020152.

The previous prime is 305020099. The next prime is 305020159. The reversal of 305020153 is 351020503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169833024 + 135187129 = 13032^2 + 11627^2 .

It is a cyclic number.

It is not a de Polignac number, because 305020153 - 2²¹ = 302923001 is a prime.

It is a super-2 number, since 2×305020153² = 186074587472286818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 305020153.

It is not a weakly prime, because it can be changed into another prime (305020159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152510076 + 152510077.

It is an arithmetic number, because the mean of its divisors is an integer number (152510077).

Almost surely, 2^305020153 is an apocalyptic number.

It is an amenable number.

305020153 is a deficient number, since it is larger than the sum of its proper divisors (1).

305020153 is an equidigital number, since it uses as much as digits as its factorization.

305020153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 305020153 is about 17464.8261657538. The cubic root of 305020153 is about 673.1463752143.

Adding to 305020153 its reverse (351020503), we get a palindrome (656040656).

The spelling of 305020153 in words is "three hundred five million, twenty thousand, one hundred fifty-three".