61520203 has 2 divisors, whose sum is σ = 61520204. Its totient is φ = 61520202.

The previous prime is 61520191. The next prime is 61520219. The reversal of 61520203 is 30202516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61520203 - 2⁹ = 61519691 is a prime.

It is a super-2 number, since 2×61520203² = 7569470754322418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61520243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30760101 + 30760102.

It is an arithmetic number, because the mean of its divisors is an integer number (30760102).

Almost surely, 2^61520203 is an apocalyptic number.

61520203 is a deficient number, since it is larger than the sum of its proper divisors (1).

61520203 is an equidigital number, since it uses as much as digits as its factorization.

61520203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 61520203 is about 7843.4815611436. The cubic root of 61520203 is about 394.7655565473.

Adding to 61520203 its reverse (30202516), we get a palindrome (91722719).

The spelling of 61520203 in words is "sixty-one million, five hundred twenty thousand, two hundred three".