55137253 has 2 divisors, whose sum is σ = 55137254. Its totient is φ = 55137252.

The previous prime is 55137217. The next prime is 55137293. The reversal of 55137253 is 35273155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51365889 + 3771364 = 7167^2 + 1942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55137253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55137293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568626 + 27568627.

It is an arithmetic number, because the mean of its divisors is an integer number (27568627).

Almost surely, 2^55137253 is an apocalyptic number.

It is an amenable number.

55137253 is a deficient number, since it is larger than the sum of its proper divisors (1).

55137253 is an equidigital number, since it uses as much as digits as its factorization.

55137253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 31.

The square root of 55137253 is about 7425.4463165523. The cubic root of 55137253 is about 380.6113267090.

The spelling of 55137253 in words is "fifty-five million, one hundred thirty-seven thousand, two hundred fifty-three".