61505053 has 2 divisors, whose sum is σ = 61505054. Its totient is φ = 61505052.

The previous prime is 61505029. The next prime is 61505057. The reversal of 61505053 is 35050516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36324729 + 25180324 = 6027^2 + 5018^2 .

It is a cyclic number.

It is not a de Polignac number, because 61505053 - 2⁵ = 61505021 is a prime.

It is a super-3 number, since 3×61505053³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61505057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30752526 + 30752527.

It is an arithmetic number, because the mean of its divisors is an integer number (30752527).

Almost surely, 2^61505053 is an apocalyptic number.

It is an amenable number.

61505053 is a deficient number, since it is larger than the sum of its proper divisors (1).

61505053 is an equidigital number, since it uses as much as digits as its factorization.

61505053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 61505053 is about 7842.5157315749. The cubic root of 61505053 is about 394.7331488238.

Adding to 61505053 its reverse (35050516), we get a palindrome (96555569).

The spelling of 61505053 in words is "sixty-one million, five hundred five thousand, fifty-three".