1555350061 has 2 divisors, whose sum is σ = 1555350062. Its totient is φ = 1555350060.

The previous prime is 1555350023. The next prime is 1555350067. The reversal of 1555350061 is 1600535551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489496836 + 65853225 = 38594^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555350061 - 2¹¹ = 1555348013 is a prime.

It is a super-2 number, since 2×1555350061² = 4838227624505407442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555350067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777675030 + 777675031.

It is an arithmetic number, because the mean of its divisors is an integer number (777675031).

Almost surely, 2^1555350061 is an apocalyptic number.

It is an amenable number.

1555350061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555350061 is an equidigital number, since it uses as much as digits as its factorization.

1555350061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 1555350061 is about 39437.9266823194. The cubic root of 1555350061 is about 1158.6245242950.

The spelling of 1555350061 in words is "one billion, five hundred fifty-five million, three hundred fifty thousand, sixty-one".