240451481 has 2 divisors, whose sum is σ = 240451482. Its totient is φ = 240451480.

The previous prime is 240451411. The next prime is 240451487. The reversal of 240451481 is 184154042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239754256 + 697225 = 15484^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 240451481 - 2¹⁸ = 240189337 is a prime.

It is a super-2 number, since 2×240451481² = 115633829430186722, 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 (240451487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120225740 + 120225741.

It is an arithmetic number, because the mean of its divisors is an integer number (120225741).

Almost surely, 2^240451481 is an apocalyptic number.

It is an amenable number.

240451481 is a deficient number, since it is larger than the sum of its proper divisors (1).

240451481 is an equidigital number, since it uses as much as digits as its factorization.

240451481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 240451481 is about 15506.4980250216. The cubic root of 240451481 is about 621.8359394370.

The spelling of 240451481 in words is "two hundred forty million, four hundred fifty-one thousand, four hundred eighty-one".