61115503 has 2 divisors, whose sum is σ = 61115504. Its totient is φ = 61115502.

The previous prime is 61115497. The next prime is 61115521. The reversal of 61115503 is 30551116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61115503 - 2⁵ = 61115471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61115203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30557751 + 30557752.

It is an arithmetic number, because the mean of its divisors is an integer number (30557752).

Almost surely, 2^61115503 is an apocalyptic number.

61115503 is a deficient number, since it is larger than the sum of its proper divisors (1).

61115503 is an equidigital number, since it uses as much as digits as its factorization.

61115503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 61115503 is about 7817.6405008161. The cubic root of 61115503 is about 393.8980191625.

Adding to 61115503 its reverse (30551116), we get a palindrome (91666619).

The spelling of 61115503 in words is "sixty-one million, one hundred fifteen thousand, five hundred three".