55249751 has 2 divisors, whose sum is σ = 55249752. Its totient is φ = 55249750.

The previous prime is 55249721. The next prime is 55249787. The reversal of 55249751 is 15794255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55249751 - 2¹⁸ = 54987607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55249721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27624875 + 27624876.

It is an arithmetic number, because the mean of its divisors is an integer number (27624876).

Almost surely, 2^55249751 is an apocalyptic number.

55249751 is a deficient number, since it is larger than the sum of its proper divisors (1).

55249751 is an equidigital number, since it uses as much as digits as its factorization.

55249751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

The square root of 55249751 is about 7433.0176240878. The cubic root of 55249751 is about 380.8700079862.

The spelling of 55249751 in words is "fifty-five million, two hundred forty-nine thousand, seven hundred fifty-one".