1355216461 has 2 divisors, whose sum is σ = 1355216462. Its totient is φ = 1355216460.

The previous prime is 1355216453. The next prime is 1355216479. The reversal of 1355216461 is 1646125531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1334513961 + 20702500 = 36531^2 + 4550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355216461 - 2³ = 1355216453 is a prime.

It is a super-2 number, since 2×1355216461² = 3673223312330729042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355216411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677608230 + 677608231.

It is an arithmetic number, because the mean of its divisors is an integer number (677608231).

Almost surely, 2^1355216461 is an apocalyptic number.

It is an amenable number.

1355216461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355216461 is an equidigital number, since it uses as much as digits as its factorization.

1355216461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 1355216461 is about 36813.2647424811. The cubic root of 1355216461 is about 1106.6311464120.

The spelling of 1355216461 in words is "one billion, three hundred fifty-five million, two hundred sixteen thousand, four hundred sixty-one".