61018203 has 4 divisors (see below), whose sum is σ = 81357608. Its totient is φ = 40678800.

The previous prime is 61018193. The next prime is 61018229. The reversal of 61018203 is 30281016.

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

It is not a de Polignac number, because 61018203 - 2⁵ = 61018171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61018203.

It is not an unprimeable number, because it can be changed into a prime (61018003) 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, 10169698 + ... + 10169703.

It is an arithmetic number, because the mean of its divisors is an integer number (20339402).

Almost surely, 2^61018203 is an apocalyptic number.

61018203 is a deficient number, since it is larger than the sum of its proper divisors (20339405).

61018203 is a wasteful number, since it uses less digits than its factorization.

61018203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339404.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61018203 is about 7811.4149166460. The cubic root of 61018203 is about 393.6888707320.

Adding to 61018203 its reverse (30281016), we get a palindrome (91299219).

The spelling of 61018203 in words is "sixty-one million, eighteen thousand, two hundred three".