61331603 has 4 divisors (see below), whose sum is σ = 61350360. Its totient is φ = 61312848.

The previous prime is 61331587. The next prime is 61331623. The reversal of 61331603 is 30613316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61331603 - 2⁴ = 61331587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61331623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3050 + ... + 11487.

It is an arithmetic number, because the mean of its divisors is an integer number (15337590).

Almost surely, 2^61331603 is an apocalyptic number.

61331603 is a deficient number, since it is larger than the sum of its proper divisors (18757).

61331603 is a wasteful number, since it uses less digits than its factorization.

61331603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18756.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 61331603 is about 7831.4496103850. The cubic root of 61331603 is about 394.3617380049.

Adding to 61331603 its reverse (30613316), we get a palindrome (91944919).

The spelling of 61331603 in words is "sixty-one million, three hundred thirty-one thousand, six hundred three".