55742261 has 8 divisors (see below), whose sum is σ = 56519424. Its totient is φ = 54969840.

The previous prime is 55742249. The next prime is 55742287. The reversal of 55742261 is 16224755.

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 55742261 - 2¹⁰ = 55741237 is a prime.

It is a super-2 number, since 2×55742261² = 6214399322784242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55742161) 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, 26915 + ... + 28911.

It is an arithmetic number, because the mean of its divisors is an integer number (7064928).

Almost surely, 2^55742261 is an apocalyptic number.

It is an amenable number.

55742261 is a deficient number, since it is larger than the sum of its proper divisors (777163).

55742261 is a wasteful number, since it uses less digits than its factorization.

55742261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371.

The product of its digits is 16800, while the sum is 32.

The square root of 55742261 is about 7466.0740017763. The cubic root of 55742261 is about 381.9983849972.

The spelling of 55742261 in words is "fifty-five million, seven hundred forty-two thousand, two hundred sixty-one".