1553030500381 has 2 divisors, whose sum is σ = 1553030500382. Its totient is φ = 1553030500380.

The previous prime is 1553030500303. The next prime is 1553030500397. The reversal of 1553030500381 is 1830050303551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888006560281 + 665023940100 = 942341^2 + 815490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553030500381 - 2²¹ = 1553028403229 is a prime.

It is a super-2 number, since 2×1553030500381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553030500081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776515250190 + 776515250191.

It is an arithmetic number, because the mean of its divisors is an integer number (776515250191).

Almost surely, 2^{1553030500381} is an apocalyptic number.

It is an amenable number.

1553030500381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553030500381 is an equidigital number, since it uses as much as digits as its factorization.

1553030500381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 1553030500381 in words is "one trillion, five hundred fifty-three billion, thirty million, five hundred thousand, three hundred eighty-one".