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61226861 = 109755813
BaseRepresentation
bin1110100110001…
…1111101101101
311021012122110112
43221203331231
5111133224421
610024145405
71342263653
oct351437555
9137178415
1061226861
1131619713
1218608265
13c8b9517
1481badd3
15559645b
hex3a63f6d

61226861 has 4 divisors (see below), whose sum is σ = 61283772. Its totient is φ = 61169952.

The previous prime is 61226849. The next prime is 61226887. The reversal of 61226861 is 16862216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27237961 + 33988900 = 5219^2 + 5830^2 .

It is a cyclic number.

It is not a de Polignac number, because 61226861 - 214 = 61210477 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 (61226461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26810 + ... + 29003.

It is an arithmetic number, because the mean of its divisors is an integer number (15320943).

Almost surely, 261226861 is an apocalyptic number.

It is an amenable number.

61226861 is a deficient number, since it is larger than the sum of its proper divisors (56911).

61226861 is a wasteful number, since it uses less digits than its factorization.

61226861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56910.

The product of its digits is 6912, while the sum is 32.

The square root of 61226861 is about 7824.7594851216. The cubic root of 61226861 is about 394.1371133323.

The spelling of 61226861 in words is "sixty-one million, two hundred twenty-six thousand, eight hundred sixty-one".

Divisors: 1 1097 55813 61226861