61855253 has 2 divisors, whose sum is σ = 61855254. Its totient is φ = 61855252.

The previous prime is 61855219. The next prime is 61855291. The reversal of 61855253 is 35255816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33200644 + 28654609 = 5762^2 + 5353^2 .

It is a cyclic number.

It is not a de Polignac number, because 61855253 - 2¹⁴ = 61838869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_3665528 and since 61855253 and 3665528 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61855153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30927626 + 30927627.

It is an arithmetic number, because the mean of its divisors is an integer number (30927627).

Almost surely, 2^61855253 is an apocalyptic number.

It is an amenable number.

61855253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61855253 is an equidigital number, since it uses as much as digits as its factorization.

61855253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 61855253 is about 7864.8110593962. The cubic root of 61855253 is about 395.4809140074.

The spelling of 61855253 in words is "sixty-one million, eight hundred fifty-five thousand, two hundred fifty-three".