61542253 has 2 divisors, whose sum is σ = 61542254. Its totient is φ = 61542252.

The previous prime is 61542241. The next prime is 61542269. The reversal of 61542253 is 35224516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56220004 + 5322249 = 7498^2 + 2307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61542253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61542233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30771126 + 30771127.

It is an arithmetic number, because the mean of its divisors is an integer number (30771127).

Almost surely, 2^61542253 is an apocalyptic number.

It is an amenable number.

61542253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61542253 is an equidigital number, since it uses as much as digits as its factorization.

61542253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 61542253 is about 7844.8870610099. The cubic root of 61542253 is about 394.8127147183.

Adding to 61542253 its reverse (35224516), we get a palindrome (96766769).

The spelling of 61542253 in words is "sixty-one million, five hundred forty-two thousand, two hundred fifty-three".