1534181381 has 2 divisors, whose sum is σ = 1534181382. Its totient is φ = 1534181380.

The previous prime is 1534181347. The next prime is 1534181399. The reversal of 1534181381 is 1831814351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250258881 + 283922500 = 35359^2 + 16850^2 .

It is an emirp because it is prime and its reverse (1831814351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1534181381 - 2¹⁰ = 1534180357 is a prime.

It is a super-2 number, since 2×1534181381² = 4707425019614134322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1534181681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767090690 + 767090691.

It is an arithmetic number, because the mean of its divisors is an integer number (767090691).

Almost surely, 2^1534181381 is an apocalyptic number.

It is an amenable number.

1534181381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534181381 is an equidigital number, since it uses as much as digits as its factorization.

1534181381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 1534181381 is about 39168.6275097813. The cubic root of 1534181381 is about 1153.3441113983.

The spelling of 1534181381 in words is "one billion, five hundred thirty-four million, one hundred eighty-one thousand, three hundred eighty-one".