550420513 has 2 divisors, whose sum is σ = 550420514. Its totient is φ = 550420512.

The previous prime is 550420489. The next prime is 550420517. The reversal of 550420513 is 315024055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549058624 + 1361889 = 23432^2 + 1167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550420513 is a prime.

It is a super-2 number, since 2×550420513² = 605925482262366338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (550420517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275210256 + 275210257.

It is an arithmetic number, because the mean of its divisors is an integer number (275210257).

Almost surely, 2^550420513 is an apocalyptic number.

It is an amenable number.

550420513 is a deficient number, since it is larger than the sum of its proper divisors (1).

550420513 is an equidigital number, since it uses as much as digits as its factorization.

550420513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 550420513 is about 23461.0424533949. The cubic root of 550420513 is about 819.5300266466.

Adding to 550420513 its reverse (315024055), we get a palindrome (865444568).

The spelling of 550420513 in words is "five hundred fifty million, four hundred twenty thousand, five hundred thirteen".