1451551481 has 2 divisors, whose sum is σ = 1451551482. Its totient is φ = 1451551480.

The previous prime is 1451551421. The next prime is 1451551513. The reversal of 1451551481 is 1841551541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930799081 + 520752400 = 30509^2 + 22820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451551481 - 2³⁰ = 377809657 is a prime.

It is a super-2 number, since 2×1451551481² = 4214003403986586722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1451551411) 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, 725775740 + 725775741.

It is an arithmetic number, because the mean of its divisors is an integer number (725775741).

Almost surely, 2^1451551481 is an apocalyptic number.

It is an amenable number.

1451551481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451551481 is an equidigital number, since it uses as much as digits as its factorization.

1451551481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16000, while the sum is 35.

The square root of 1451551481 is about 38099.2320263808. The cubic root of 1451551481 is about 1132.2547407175.

The spelling of 1451551481 in words is "one billion, four hundred fifty-one million, five hundred fifty-one thousand, four hundred eighty-one".