1550545501 has 2 divisors, whose sum is σ = 1550545502. Its totient is φ = 1550545500.

The previous prime is 1550545481. The next prime is 1550545511. The reversal of 1550545501 is 1055450551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1044970276 + 505575225 = 32326^2 + 22485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1550545501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550545511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775272750 + 775272751.

It is an arithmetic number, because the mean of its divisors is an integer number (775272751).

Almost surely, 2^1550545501 is an apocalyptic number.

It is an amenable number.

1550545501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550545501 is an equidigital number, since it uses as much as digits as its factorization.

1550545501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12500, while the sum is 31.

The square root of 1550545501 is about 39376.9666302523. The cubic root of 1550545501 is about 1157.4302759246.

The spelling of 1550545501 in words is "one billion, five hundred fifty million, five hundred forty-five thousand, five hundred one".