61088257 has 2 divisors, whose sum is σ = 61088258. Its totient is φ = 61088256.

The previous prime is 61088243. The next prime is 61088273. The reversal of 61088257 is 75288016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50822641 + 10265616 = 7129^2 + 3204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61088257 is a prime.

It is not a weakly prime, because it can be changed into another prime (61082257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30544128 + 30544129.

It is an arithmetic number, because the mean of its divisors is an integer number (30544129).

Almost surely, 2^61088257 is an apocalyptic number.

It is an amenable number.

61088257 is a deficient number, since it is larger than the sum of its proper divisors (1).

61088257 is an equidigital number, since it uses as much as digits as its factorization.

61088257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 61088257 is about 7815.8977091566. The cubic root of 61088257 is about 393.8394756936.

It can be divided in two parts, 6108 and 8257, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 61088257 in words is "sixty-one million, eighty-eight thousand, two hundred fifty-seven".