61530003 has 16 divisors (see below), whose sum is σ = 93096960. Its totient is φ = 40146408.

The previous prime is 61529977. The next prime is 61530011. The reversal of 61530003 is 30003516.

It is not a de Polignac number, because 61530003 - 2²² = 57335699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61530043) 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 in 15 ways as a sum of consecutive naturals, for example, 22975 + ... + 25512.

It is an arithmetic number, because the mean of its divisors is an integer number (5818560).

Almost surely, 2^61530003 is an apocalyptic number.

61530003 is a deficient number, since it is larger than the sum of its proper divisors (31566957).

61530003 is a wasteful number, since it uses less digits than its factorization.

61530003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48543 (or 48537 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 61530003 is about 7844.1062588417. The cubic root of 61530003 is about 394.7865171253.

Adding to 61530003 its reverse (30003516), we get a palindrome (91533519).

The spelling of 61530003 in words is "sixty-one million, five hundred thirty thousand, three".