55101257 has 8 divisors (see below), whose sum is σ = 55854792. Its totient is φ = 54352000.

The previous prime is 55101227. The next prime is 55101289. The reversal of 55101257 is 75210155.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14409616 + 40691641 = 3796^2 + 6379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55101257 - 2¹⁰ = 55100233 is a prime.

It is a super-2 number, since 2×55101257² = 6072297045960098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55101217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31157 + ... + 32877.

It is an arithmetic number, because the mean of its divisors is an integer number (6981849).

Almost surely, 2^55101257 is an apocalyptic number.

It is an amenable number.

55101257 is a deficient number, since it is larger than the sum of its proper divisors (753535).

55101257 is a wasteful number, since it uses less digits than its factorization.

55101257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 55101257 is about 7423.0220934603. The cubic root of 55101257 is about 380.5284821283.

The spelling of 55101257 in words is "fifty-five million, one hundred one thousand, two hundred fifty-seven".