55761257 has 8 divisors (see below), whose sum is σ = 60283200. Its totient is φ = 51398064.

The previous prime is 55761227. The next prime is 55761347. The reversal of 55761257 is 75216755.

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 55761257 - 2¹⁶ = 55695721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55761257.

It is not an unprimeable number, because it can be changed into a prime (55761217) 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, 38957 + ... + 40362.

It is an arithmetic number, because the mean of its divisors is an integer number (7535400).

Almost surely, 2^55761257 is an apocalyptic number.

It is an amenable number.

55761257 is a deficient number, since it is larger than the sum of its proper divisors (4521943).

55761257 is a wasteful number, since it uses less digits than its factorization.

55761257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79375.

The product of its digits is 73500, while the sum is 38.

The square root of 55761257 is about 7467.3460479611. The cubic root of 55761257 is about 382.0417728868.

The spelling of 55761257 in words is "fifty-five million, seven hundred sixty-one thousand, two hundred fifty-seven".