61501003 has 4 divisors (see below), whose sum is σ = 61701640. Its totient is φ = 61300368.

The previous prime is 61500983. The next prime is 61501009. The reversal of 61501003 is 30010516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61501003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61501009) 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, 99858 + ... + 100471.

It is an arithmetic number, because the mean of its divisors is an integer number (15425410).

Almost surely, 2^61501003 is an apocalyptic number.

61501003 is a deficient number, since it is larger than the sum of its proper divisors (200637).

61501003 is a wasteful number, since it uses less digits than its factorization.

61501003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200636.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 61501003 is about 7842.2575193626. The cubic root of 61501003 is about 394.7244844715.

Adding to 61501003 its reverse (30010516), we get a palindrome (91511519).

The spelling of 61501003 in words is "sixty-one million, five hundred one thousand, three".