615883481 has 2 divisors, whose sum is σ = 615883482. Its totient is φ = 615883480.

The previous prime is 615883439. The next prime is 615883487. The reversal of 615883481 is 184388516.

It is a happy number.

615883481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335622400 + 280261081 = 18320^2 + 16741^2 .

It is a cyclic number.

It is not a de Polignac number, because 615883481 - 2¹⁴ = 615867097 is a prime.

It is a super-2 number, since 2×615883481² = 758624924337354722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (615883487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307941740 + 307941741.

It is an arithmetic number, because the mean of its divisors is an integer number (307941741).

Almost surely, 2^615883481 is an apocalyptic number.

It is an amenable number.

615883481 is a deficient number, since it is larger than the sum of its proper divisors (1).

615883481 is an equidigital number, since it uses as much as digits as its factorization.

615883481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 44.

The square root of 615883481 is about 24816.9998388202. Note that the first 3 decimals coincide. The cubic root of 615883481 is about 850.8105214568.

The spelling of 615883481 in words is "six hundred fifteen million, eight hundred eighty-three thousand, four hundred eighty-one".