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55726861 = 232422907
BaseRepresentation
bin1101010010010…
…1001100001101
310212212012212211
43110211030031
5103231224421
65310230421
71244445661
oct324451415
9125765784
1055726861
1129502463
12167b5411
13b711c98
1475888a1
154d5b9e1
hex352530d

55726861 has 4 divisors (see below), whose sum is σ = 58149792. Its totient is φ = 53303932.

The previous prime is 55726859. The next prime is 55726877. The reversal of 55726861 is 16862755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55726861 - 21 = 55726859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55726841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211431 + ... + 1211476.

It is an arithmetic number, because the mean of its divisors is an integer number (14537448).

Almost surely, 255726861 is an apocalyptic number.

It is an amenable number.

55726861 is a deficient number, since it is larger than the sum of its proper divisors (2422931).

55726861 is a wasteful number, since it uses less digits than its factorization.

55726861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422930.

The product of its digits is 100800, while the sum is 40.

The square root of 55726861 is about 7465.0425986728. The cubic root of 55726861 is about 381.9632033304.

The spelling of 55726861 in words is "fifty-five million, seven hundred twenty-six thousand, eight hundred sixty-one".

Divisors: 1 23 2422907 55726861