1542513481 has 2 divisors, whose sum is σ = 1542513482. Its totient is φ = 1542513480.

The previous prime is 1542513449. The next prime is 1542513491. The reversal of 1542513481 is 1843152451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1340731456 + 201782025 = 36616^2 + 14205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542513481 - 2⁵ = 1542513449 is a prime.

It is a super-2 number, since 2×1542513481² = 4758695678133474722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1542513421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771256740 + 771256741.

It is an arithmetic number, because the mean of its divisors is an integer number (771256741).

Almost surely, 2^1542513481 is an apocalyptic number.

It is an amenable number.

1542513481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542513481 is an equidigital number, since it uses as much as digits as its factorization.

1542513481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 34.

The square root of 1542513481 is about 39274.8453975315. The cubic root of 1542513481 is about 1155.4282704313.

The spelling of 1542513481 in words is "one billion, five hundred forty-two million, five hundred thirteen thousand, four hundred eighty-one".